I've been considering building my own Quiver-inspired tool, in part because I'm a bit concerned at the lack of updates, in part because there are a few itches I would like scratched, and in part because of the Mac-only situation.

I might at some point, in which case I'll look up your comment, but the main reason I'm holding off is that it's quite a bit of work in a market that strikes me as rather oversaturated...

Then again sometimes the best reason to start a project is to scratch an itch, and always thinking in terms of 'useful' is a surefire way to suck all the fun out of life. Hmm...