Comment Help the Third World (Score 2, Informative) 409
Depending on where you are, Computer Aid International may be able to help.
If you're in the Bristol/Avon or Reading areas of the UK, a great little charity called Computers for African Schools might be interested if the machine is at least a P75, 32MB RAM, 1GB HDD. These guys do some excellent work, refurbishing these machines and shipping them out to Zimbabwe, Malawi and Zambia. I work with them on occasion, not so much because I want to help the third world (though of course that's important) but mainly because I hate to see good machines go to waste.