We're on the Microsoft stack at SocialBlaze: http://www.socialblazeapp.com (Windows Server 2008, SQL Server 2008 R2, asp.net MVC 2.0, c# 4.0)
We do a lot of processing and storing of data, SQL Server is awesome for that.
Microsoft has a bad rep, but the libraries/tools/services they have are pretty powerful, bug-free, and easy to implement.
Only downside seems to be cost, but with BizSpark you don't have to worry about it for 3 years. And after 3 years you really shouldn't have to worry about it either because paying for it shouldn't be a problem.
We do a lot of processing and storing of data, SQL Server is awesome for that.
Microsoft has a bad rep, but the libraries/tools/services they have are pretty powerful, bug-free, and easy to implement.
Only downside seems to be cost, but with BizSpark you don't have to worry about it for 3 years. And after 3 years you really shouldn't have to worry about it either because paying for it shouldn't be a problem.