Just a quick bit of feedback - I think you could do with changing the captcha question for new registrations. It took me at least 5 attempts to get it right. I started with lots of variations of the word 'stag' - to the initiated, the chosen word (not giving it away in case those pesky auto-registration bots figure it out!) might not be the first word they think of.
If it nearly put me off, I imagine it's putting off a lot of other users from registering too.
Hope this helps,