I found this site..
www.travbuddy.com/
I think its a good example of where CB could be improved from a user perspective. I love CB and I think its probably capable of doing almost everything this site does.
The difference is presentation- I think the template system is one part of CB that really needs to mature so that the sites using them could look more professional.
Not a criticism.. for an opensource project I think the team has done miracles-especially in the past year.
Just a thought on some things that could be focused on...
thanks
Mark