YC tried highrise. It is not good. I actually went to the trouble of telling Fried what seemed broken about it, and got back a reply saying everybody else loved it, so I must be wrong.
According to their book, they don't listen to feedback!
"That's why you start with no. Every new feature request that comes to us -- or from us -- meets a no. We listen but don't act. The initial response is "not now." If a request for a feature keeps coming back, that's when we know it's time to take a deeper look. Then, and only then, do we start considering the feature for real."
I can't remember very precisely. One problem was that we couldn't create a contact without a first name. Another was that it took so many keystrokes to add a new contact. I think another was that you could only see a few per page.