Without knowing exactly how many basses he has and such, I can at least give you a rundown on the different types of gear he uses:
Basses:
-Ernie Ball Music Man Stingray basses (both 4 and 5-string modesl, with both rosewood and maple necks, in a wide variety of colors)
-Fender Precision basses (he has 2 or 3 of these, they're all reissues of early '60s models)
-Fender Jazz Bass 5-string (used in the studio for Meteora)
Sample-related stuff:
-Starr Labs Z-Tar (custom-built model for Phoenix, used on Blackout)
-Akai MPC500 (used on early performances of Blackout)
-M-Audio Trigger Finger (used on Lost in the Echo, Lies Greed Misery, and Victimized)
Amps:
-Ampeg SVT Classic heads
-Ampeg SVT-810E 8x10 cabinets
Effects/Rack-mounted gear:
-Dirty Boy Bass Bully overdrive
-Electro-Harmonix Holy Grail Plus reverb
-Z-Vex Mastotron distortion
-Boss LS-2 Line Selector
-Tech 21 PSA1 SansAmp preamp
He also uses Dean Markley Blue Steel strings and .88 gauge Dunlop picks. At one point he was using a Shure wireless, but I think he uses Audio-Technica like the rest of the guys do now.