Microsoft stack web host with HIPAA expertise?

I'm a consultant, helping a pr开发者_StackOverflow社区ovider of small medical practice management software move to the web. We're looking for a host that has experience with HIPAA-compliance, and supports the MS Web stack (IIS/.NET/SQL Server)

Can anyone here provide a recommendation of such a hosting company?

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Look at Connectria; they seem to meet all of your requirements and have a quite impressive client list. I haven't used them personally though.