Any Design and Architecture Consultants?

I work for a prelaunch web start up that is built on .NET. We do hosted collaborative filtering / recommender systems. We do not really have a senior architect type of person in our team and do not have the capacity to hire one full time. We were wonder if anyone could recommend consultants in the SF Bay Area for distributed c#/.NET development. If you're interested, please email me at "hanyangliu" over at gmail.com.