This is a great concept - giving each question a score and allowing it to gain/lose exposure based on it, similar to HN/Reddit.

Wouldn't that make it a minimal quora/SO that you don't have to specially post your questions on?

Or, and while we're at it — location filters for location-based questions would be the greatest (although much more hard to implement) feature. I don't want to answer someone's question about his homework, clearly directed for his friends, but I would gladly give advice to a tourist who found himself in a place I know.

I think that the system requires some form of filtering - be it by location, score, hashtag or otherwise. A featured which allows a user to get to the questions they can answer quickly is definitely something that needs to be developed.

It'd also be great if you could add keywords you wanted in the questions surfaced to you, targeting the questions you get more specifically at what you're familiar with ("plumbing", "pipes", "leaking" questions for plumbers etc). Increasing relevance would help make it more useful.