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A new service called Guerrilla Mail creates email addresses that are only active for 60 minutes. Within that time frame you are allowed to receive and send emails. It is ideal for online services you only on plan to using once that require email addresses. Once your done, you don’t have to worry about that site’s pesky spam emails anymore. Enjoy.
mailinator.com does this too. These things are indispensable when developing an app that needs to send emails (e.g. a web page with email notifications). Mailinator isn’t new though, I’ve been using it for over a year now.
The guys who did the Pirate Bay have been running a similar service called Slops Box (http://slopsbox.com/). Very useful.