Yes, the Tallboy Carbon will accept most bb mount guides. We've had good success with the following:
MRP Lopes (med angle)
MRP Mini G SL (med angle)
E13 LG1 TR.

For a more XC oriented bike, try a top-mount only guide like the E13 XCX or MRP 1x. We recommend the BB mount version as they are lighter and cheaper than the seat tube mounts.

The Tallboy C will accept most any offerings from major crank manufacturers. XX cranks will fit, but make sure you order the "standard" Q-factor version (166)- not the narrow 156mm version.

It is true that there are some slight weight savings available with the various pressfit bb designs (exact weight savings obviously vary depending on system, frame manufacturing techniques, and crank model), but we don't feel this small savings make up for the inconveniences. We are still able to make a frame that is lighter than most of our competitors (5.1 lbs), while still using a heavier bb system. There are a number of disadvantages that exist with press fit systems:

1) Special installation and removal tools are required for these parts, including a headset press. This is not convenient for most home mechanics, and they are quite expensive. Traditional external BB's can be installed or removed with a simple $10 hand tool.
2) "Permanently installed cups". Shimano doesn't recommend removing and re-installing their press in bb cups (as they may become damaged), so moving parts from bike to bike is no longer an option. http://techdocs.shimano.com/media/techdocs/content/cycle/SI/SI_0053A_001/SI_0053A_001_En_v1_m56577569830625426.pdf
3) Creaking or shifting bb's can be common with these systems. Since the bearing is pressed into a cup, which is then pressed into the frame- it can be hard to get all of the press fits snug- without being too tight on the bearing or too loose in the frame.
4) Reasonable tube sizes. One of the most commonly claimed advantages of a larger bb shell is the larger diameter downtube that goes with it. This may be an advantage on road bikes, where tubes can be increadibly thin and large for optimal stiffness. On a mountain bike, this area of the frame sees a lot of abuse from rocks and crashing, and needs to have a certain amount of wall thickness to survive actual use. Using what we consider a "safe" wall thickness and carbon layup, and a fairly typical tube diameter, we get an exceedingly stiff, light, durable product. If we used a larger downtube, we would either have a heavier frame (same wall thickness but larger diameter), or a less durable product (thinner walls and larger diameter).
5) Chain clearance. Take a look at some of our competitors frames with press in bb shells. The down tube comes so close to the chainrings that many frames have chainsuck guards on the downtube! In our mind, the chain should be able to fall off on a mountain bike and not get jammed between your crank and thin-walled carbon downtube.
6) Backwards compatibility: Many of our customers purchase a frame and build it up with their choice of parts, or parts from an old bike. By using a standard bb, we are compatible with everything without requiring confusing adaptors.
7) Chainguide compatibility: While it may seem strange to talk about putting chainguides on a 100mm bike, it is becoming more common now with 10 speed drivetrains. Thread in bb's mean the frame is compatible with bb mount chainguides. We like versatility....

Tighten the front derailleur mounting bolt to 45 in/lbs.

The Tallboy was designed around 100-120mm forks- and will handle best in one of these configurations. However, it is strong enough to handle 140mm forks, so if you really want, you can go there.

We never like to make promises here, as tire dimensions vary so much, but pretty much any 2.35" tire will work. The WTB 2.55 Weirwolf LT fits with plenty of room. We designed the frame with significant tire and mud clearance- the front derailleur cage is actually the thing that keeps you from putting super mondo tires on there.

All frame sizes use a 6.5" x 1.5" (165x38mm)shock.
Mounting hardware on both ends is 22mm wide (21.84mm to be exact), with an 8mm through hole.

The Tallboy requires a bottom swing (high clamp), top pull, 34.9mm front derailleur. Both SRAM and Shimano make models that work.

Yes, the shock is a very common size, and there are plenty of other models on the market that will fit.

Absolutely. The frame takes a standard 34.9mm seat collar, so there are plenty of quick releases that will fit.
Our favorite is ours, of course. You can purchase it on our online store.

Yes. All frame sizes have two bottle mounting locations. One on top of the downtube, and another underneath for longer rides.

Custom aluminum mounting bolts are included with the frame.

The Tallboy uses a 30.9mm post. Make sure it is always inserted a minimum of 100mm into the frame.

185mm

We are all huge fans of adjustable seatposts, and included cable routing under the top tube for this purpose.

We use a standard 73mm bb shell, so pretty much any cranks you want will fit on there. Just make sure your crankset has a 50mm chainline, and you are good to go.

Yes- this is correct. With our newer pivot system, the pivot axle draws the link over to one side in order to properly preload the bearings. This offset is accounted for in the frame design so everything ends up nice and straight in the end.

Use this on your seatpost. Carbon frames have a pretty slippery inner surface that makes it difficult to get the seatpost held tight without massive tightening forces at the collar. Using the carbon assembly compound adds friction so you don't need to crank the heck out of the seat collar.
Definitely keep grease off your seatpost for the same reason.

This bike uses a tapered headset- which have many different configurations these days. Ours uses a standard (external) 1.5" lower cup, and a semi-integrated 1 1/8" upper. The semi-integrated upper headset is a pretty standard size these days- we use the 44mm ID standard.

As all of us frame manufacturers seem to be using slightly different configurations with tapered headtubes, these headsets are custom items. We will offer options from Chris King and Cane Creek in our kits, and also as an option with your frame purchase.

For 2010 we will be offering the Rockshox Monarch 3.3 and Fox RP23.