I ran a few searches through TechIMO, and although I know a few of us know about this wonderful service, I think it deserves its own thread.
For those of you who are unaware, SpamGourmet is a web service that allows you to create any number of "disposable" email addresses that can be used to field spam emails you can accumulate signing up for numerous endeavours. You can set the address to receive a certain number of emails, and everything after that just gets "eaten up" by the server. You never have to check the box and empty it!
http://www.spamgourmet.com/
Check it out! What do others think who've used it?