I've been searching for this topic. The tabs are great and keep things clean and organized. But as more great tabs become developed, profiles are running out of tab room. A great example is "My CB Profile" on this site. There is not room for any more tabs.
I'm not a fan of nesting. I just don't like the way it looks. So although going tabless means having to scroll through a page, it seems like this is the way CB profiles will have to go.
It would be great if we could do both tabs and tabless on the same page. Decide what we want as tabs, and what we want tabless.