I have 5 so far
my main machine is a Dell Optiplex 110 P3, 128 MB-RAM, 40 Gig HD, DVD-ROM, Zip Drive running Windows 2000 Server
Next
AMD K6-2 400 Mhz, 64 MB-RAM, 6 Gig HD, CD, running Slackware Linux 10.0
Apple iMac Rev A 233 mhz, 192 MB-RAM, 10 Gig HD, running Yellow Dog Linux & NetBSD
Laptops
Toshiba Satellite Pro 400CS P1 75Mhz, 40 MB-RAM, 775 MB HD, running Slackware Linux 4.0
NEC Versa 6000H P1 100Mhz, 80 MB-RAM, no HD yet