What do you do with a surplus Mac?

[foo]

What are the best things to do with old hardware?

I got an interesting email from a reader suggesting an article topic, but I’m not sure what I would write at this point. He noted that he, like many of us, has an increasingly large pile of largely serviceable hardware. For various reasons, I’ve been interacting with my own stash of old Macs (many of which are sadly not functional), hard drives, extra keyboards, a snake pit of cables (ADB and SCSI, woo!), and so on. What are the best things to do with all this gear? Some things that come to min…