This theme works well with BuddyPress of course, but it also works well with WPStoreCart. I have a blog, potential for discussion forum and a store in one neat package that works.
I like the available options and I find it easy enough to work with. (I'm not that technical.)
Their service, even for the free version, is excellent. I had a plugin that caused some formatting problems and they worked to help me solve it quickly. Better service than most paid services I've used.
check it out at http://www.kidsbookgroup.com