Link here :
http://bcfxer.appspot.com/I am updating the graph it uses with user feedback. The graph is "live" so that I can adjust the weights programatically and the idea is that it will poll the different means of exchange and update the fees and percentage lost per transaction on a regular basis (don't need realtime - but perhaps every few hours).
eg. Let's imagine localbitcoins has someone offloading their btc for a knock down rate - then the app will display that (if you are looking to convert USD Cash -> BTC for example). Now when that offer no longer exists, it may be more favourable to use coinbase and/or blockchain etc etc.
Any feedback appreciated. Feel free to use the add/new box which is an anonymous comment area or just in this thread.
The plan is to monetize it not by paid promotion in the rankings but kickbacks from referrals to sites (eg sealswithclubs, satoshi dice or equivalents). It doesn't need to generate much as it's running free on google app engine currently. All the graph can be memcached so it hardly makes any data calls (apart from when the routes are edited/ added -when it's flushed).
All feedback gratefully received.