P.S. the mods out for the PC are pretty fantastic considering there is no SDK yet
http://www.fallout3nexus.com
I would recommend checking out the Cross Repair mods, they're pretty nice for such an artificial limitation on the game mechanics. Also, SagerFO3 rebalance and VATS MCE do various gameplay tweaks to make things a little more logical (reduced aiming if your arms get crippled, reduced movement if your legs get crippled, aiming is based more on skill and less on distance in the formulas the game uses, etc).
Also the Robco Certified perk mod is pretty pimp, you can make your own temporary robot minions.