I've read many discussions on APIs in search of inspiration to write the ideal SO client; I've also twice started writing one, but gave up almost immediately.

My ideal SO client should pull new questions very often (at least each minute), find *interesting* ones (by tags or who knows what), then alert me in an unannoying fashion (maybe an icon in systray?). It should also allow for different levels of interest, like: "STFU, I'm working!", "only interesting ones, please", and "whatever, please: I'm bored!".

I gave a try to some rss readers, but without success, as there are too many new questions. 

In the end, the best SO client I've found till now is the browser: click the "questions" link, read the summary, be happy if interesting questions are there, click the "questions" link again otherwise.

So: is anyone successfully using something different than a browser to spot interesting questions on SO?