Dont listen to me check out this article:
 
http://alwayson.goingon.com/permalink/post/5552

Successful SaaS companies built on the Microsoft platform:

  • MySpace—built on Microsoft from the start—100 million users, more traffic than Google, 2nd to Yahoo
  • NewsGator--receives nearly 10 million API requests on an average day and nearly a million users are signed up for its consumer products
  • ExactTarget—email marketing company--more than 5,000 requests per minute and over 200 million new records added every day
  • EchoPass-- delivering end-to-end customer contact solutions for clients at a fraction of the cost and with far greater flexibility than traditional solutions
  • Lathian-- offers life sciences companies an integrated, full-service range of online sales and marketing tools that help them improve customer relationships
  • Inrix-- By leveraging the strength of Microsoft’s server platform, Inrix processes and analyzes billions of traffic-related data points to “literally predict the future”. (IP Ventures deal)
  • Digipede-- providing a key technology for anyone providing SaaS on the Microsoft platform: distributed grid computing for greater application performance