At my girlfriend's: an old Gateway desktop (Pentium 4, 2 GHz) collecting dust. Also the server I built for her (Celeron 800 MHz) failed to POST earlier this month, may be dead dead. Not sure what I'll do to replace it; the P4 seems too wasteful, especially of energy, to run as a file server. Girlfriend uses a MacBook (Merom) as her primary computer now.
At my parents' house: an iMac DV (G3 400 MHz), Apple //c, homebuilt K6 III 400 MHz, and an exceedingly crappy Compaq (sub-1 GHz Celeron) that haven't been powered on for a year or more. My old Red Hat server, an overclocked Celeron 366 at 550 MHz, won't boot -- I think the power supply has gone. My very first Linux server (Celeron 333 MHz) didn't die, but it too hasn't been powered on for... two or three years? Am still running a Pentium II at 450 MHz as my main file server there. I think we've an ancient 486 machine sitting in the office. Oh, my girlfriend's old Gateway notebook (Pentium 4, hot!) stays in my old bedroom. Sometimes I use it when I'm at my parents' house. I think my old Apple PowerBook 165 might be in a closet somewhere too, along with my sister's ThinkPad from the mid-'90s.
Chez moi: my parents' old Dell Dimension 8200 (P 4, 2 GHz Northwood... Rambus memory!) in the basement. Two of my servers recently died (jah, when it rains, it pours...) -- the fan failed in my OptiPlex GX110 (PIII 866 MHz), then my Athlon XP 2500+ stopped booting. Haven't diagnosed properly yet. That leaves another, identical OptiPlex and another Athlon XP 2500+ running as servers. The Athlon puts out a lot of heat and is probably untenable as a server in the summer.
Ach, I forgot another dormant server, Athlon 800 MHz, at my parents' house. So much junk! Perhaps some people could suggest what to do with old components. Disposal can be costly (and feels wasteful so long as the components still work). How old a system will charities still accept? Which charities operate in my area (New York metro) and are trustworthy?
What I'd really like to find is a charity (or even a flea-market type) who will take raw components. I've plenty of half-functional systems which aren't worth my time to rebuild, especially if I must purchase replacement parts. So I'd very much like to find someone who would be willing to take partial systems, discrete components, etc. This feels less wasteful than simply tossing everything, whether in landfill or environmentally responsible disposal.
Edited: bloody hell, four systems in partial use or repurposed as servers, fifteen systems dead or in complete disuse. That can't be right...