It's been a while, so lets see where i'm at now.... (Specs are listed where i can remember them)
Intel:
Xserve Xeon (Early 2008) 2.8Ghz Octo core, 10GB ram, 7TB disk space
Mac Pro (Early 2006) 2.33Ghz Octo Core (upped from 2.66 quad), 14GB ram, 128Gb SSD + 500GB RAID
MacBook Pro (Early 2008) 2.4Ghz Dual Core, 3Gb ram, 500GB disk
Black MacBook (Mid 2007) 2.16Ghz Dual Core, 3Gb ram, 160Gb disk (I have wanted a black macbook of these since i first saw one in 2006, finally this January i had the money to buy one

(and i could justify it, since it replaced my increasingly sick MBP as my college computer)
Apple Tv First gen (Running OS X Leopard)
PPC:
MDD G4, single 1.25Ghz
2001 Quicksilver G4, single 1.2Ghz (Sonnet Upgrade, was originally 733mhz)
Sawtooth G4 450mhz (mostly gutted, only CPU can logic board remain at the moment)
Rev A PowerMac G3 B/W, 500mhz G4 (Sonnet Upgrade, was originally a 350Mhz G3)
PowerMac G5, Dual Processor 2.5ghz, modded from liquid cooling to air cooling (currently dead as a doornail, either the logicboard or powersupply has given up)
PowerMac 8600/200 with Apple PC compatibility card
Apple Work Group Server 6150/66
MacMini G4, 1.25Ghz, 1Gb Ram, 120GB disk
iMac G4, 700mhz, 40GB disk
iMac G3 RevD, 350Mhz, 80Gb Disk
Xserve G4, Dual 1ghz G4's, 2Gb Ram
Xserve G5, Single 2Ghz, 4Gb Ram
PowerMac G3 Desktop, 233Mhz
PowerMac 8500 (Case is destroyed, the PSU that came with it was dead and i can't get video from the board. But the board does chime and i like the case design... So i can't bring myself to chuck it)
iBook G3 Dual USB, 500mhz (x2)
PowerBook G4 12", 1.5Ghz
PowerBook G4 Titanium, 450mhz (Dead GPU, i might see if i can source a new chip and replace it)
PowerBook G3 Kanga
PowerBook 1400, 133mhz 603
68K:
IIx with prototype logicboard (marked "Seed1" and it has different component labellings (which i believe are closer to the II's than the IIx's, but i don't have a II to compare it to))
IIci
IIcx
IIsi
LC
LCII
LCIII
LC 475
Performa 450 (Aka re badged LCIII)
Performa 630
Qudra 840av
Qudra 950
Mac Plus
512k, whith rare MacGusto II upgrade board (built by me in December

) (this add's SCSI and a extra 2MB of ram)
512k board with ceramic CPU (these are a little more unusual than the ones with the plastic CPU)
PowerBook Duo 230
A few PowerBook 1x0 series (A 145, 145B, 160 and 165 iirc)
Just need to find a IIfx and SE/30 and my collection will be complete (not that that will stop me collecting...

)