Are you crawling for this data? Also, since currency is a tricky thing to price (almost any bank/broker can trade currencies) how do you select the "most correct" price?
It's time for the second Spawnfest (48 hour programming contest for Erlang, much like Rails Rumble and Node Knockout) and this year it is scheduled for 7th and 8th of July 2012.
Our committee is currently working on sponsors and prizes. We've secured some of the big names in the Erlang community as judges.
We're very excited about this opportunity to show the world what Erlang/OTP is capable of! The contest is not limiting entrants to web applications, in fact, we'll be having nominees in different categories.
Some financial services have already moved to the cloud, NASDAQ uses Amazon S3 for at least one product (NASDAQ Market Replay) and have done since 2008.
When it comes to banking the picture is a bit different. I know at least one small provider of banking middle office solutions, Five Degrees (www.fivedegrees.nl), is working on using the Azure service for some services.
Interesting times. As an IT developer in the financial industry, I try to follow this closely.
Also, C is not the only language worth rewriting in.