Do you hate every time you have to give your email address just to activate your registration only to receive a bunch of spam related to that service. Well now you can use Mailinator to view email sent to any username @mailinator.com you like. You just go to their site and enter the username you chose and they will show you any mail recently received at that address. There is no privacy, you can see the mail for any mailbox that has been created with them.
A neat feature is that you can subscribe to the RSS feed for any mailbox so that you can easily keep an eye on the mailbox for when new email is received.
Check out their FAQ for more information and features, especially the one near the bottom with the question “What are ‘Alternate Inbox Names’”.