http://bcfxer.appspot.com/Am now offering a bounty (haven't figured out how much to offer yet - suggestions welcome - but I can't afford 100 BTC per edit that's for sure) for new "routes" added to the database. I may have to start as low as 0.01 BTC and go up from there.
The app now calculates the "next best" alternate route. I am working on getting multiple routes out and ranking them, as well as providing an API so if you do any form of exchange, you can write directly to the app about how much you'll get for how much. That's probably in a few weeks though.
Please try it and let me know what you think !