Hello, Me and a few friends are writing an application in c#, using data from some xignite web services. While i realize we may be reinventing parts of the wheel, I think learning will be good this way, as well. Anyway all I'm looking for is a broker who has simple equity execution api's that I can call. It seems to me all the applications out there are client-side apps, we have a sever and would like access to a simple trading platform. Any ideas? Thanks!