Tempalias – Temporary Email Aliases
http://tempalias.com/

Generate an anonymous alias that will forward to your real email address. It will automatically be deleted after either your set time or message limit has been reached. Ever wanted to sign up for any kind of online service or community without providing your real email address, for example because you don’t want to get spammed? tempalias helps you out by providing temporary, anonymous email addresses, also called “aliases”. Any message sent to the tempalias address will be forwarded anonymously to your real email address. You can set a maximum number of days or messages for which the tempalias will be valid. When either limit has been reached, your temporary address will automatically be deleted. This has been added to Privacy Resources Subject Tracer™ Information Blog.