Sometimes there are problems or delays with the activation emails.
Most people get them within 1-3 days. Others never get the emails, but their accounts are activated anyways.
If it has been 3 days, you have checked your spam folder, and you still can't post, then send me an email at the address on my website (in my signature).
Or if you have a friend who is a member, have them post the request in this thread.
If you contact someone on IRC, please leave the username you tried to register with. We've been receiving PMs from people when we are away but they don't leave info for us to activate the account.