Email aliases in GMail

If you need multiple email addresses for any reason and don't want to bother creating multiple accounts then GMail has a great aliasing service.
You can receive messages sent to your.username+any.alias@gmail.com. For example, messages sent to jane.doe+notes@gmail.com are delivered to jane.doe@gmail.com.

Check out: https://mail.google.com/support/bin/answer.py?answer=12096