Private messaging is available once you've been a member for 20 days and have 20 posts. You'll automatically have the option available at that time. We had to put the restriction in place due to spammers - people would join and send PM spam, and since the mods can't access private messages, we'd only know if someone forwarded them to us.
Stick around, though, and you'll be able to PM soon!
How Do I Enable Private Messages?
