If you have recently registered but did not get a welcome email, don't worry. The email system seems to be on the fritz, and this bug is being looked into. It may come after several hours, or not at all. In the meantime, you still will be able to log in, so don't worry if you didn't receive it.
This also affects the "Forgot my password?" link, as it emails you. We should get this all hammered out pretty quickly, but in the meantime, you can use the "Contact us" form to request help, if you need it.
Thanks for your patience, and sorry for the inconvenience.
If you need your password reset or your account confirmed until we get this fixed, please feel free to hop onto the IRC server and ask an admin for assistance.