Quantify looks beautiful from the smallish images, but it doesn't jump out at me as being infinitely more usable than basecamp.

I'm not a fan of basecamp, but have used it and some of it's competitors on different projects. What struck me about all these services isn't the design (though it isn't great), but that we rely more on email and local files to share the info, and basecamp is just something that is somewhere else that you are supposed to update.

It isn't integrated into the workflow, and that is the challenge I see, not design.