I sat through a demo on Backbone, and it’s certainly the best I’ve seen so far. I wasn’t looking for a solution, and really only accepted the invitation because they had a piece of hardware I needed to get my hands on.
It’s really not terribly difficult to build a good database solution, but you do have to spend time talking with the folks doing the work, and you have to actually listen. These guys seem to have gotten that part sorted, at least in the modules I looked at.
Don’t believe they got around to integrating fraction finder data into their DB, but I’m also not sure that’s even relevant anymore…