BuddyPress.org

Interesting way to get to the registration page with just the username. I also like how you dealt with the only lowercase username issue. You might also check out this solution that r-a-y put together: https://trac.buddypress.org/ticket/2207

Page looks pretty good, but as you said in your blog, I’m not sure it completely communicates your message of what the site can do for new users.