crank brothers has a sweet multi-tool. Park is good as well, Pedros is good.
and get a CO2 compressed air pump- I guess it depends on what riding you do and how long- but I hate carrying around a pump when I am only going 2 hours or so. I use a genuine innovations air chuck sl- around $15 or so... make sure you have a floor pump at home though. It could get expensive if you use cartridges to maintain your bike.
1997 Schwinn Moab2 cross-country racing, highly modified, rebuilt many, many times. very fast!
co2 compressed air is a drag. I use a crank bros. pump mounted up high as possible (without sticking past the head tube), on the down tube, on the left hand side (non-drive side). It never gets in the way, dosent bounce around like co2s can, doesn't weigh as much, and I can use it more than once.