Best Asp.Net Hosting for Unlimited Domains

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I want a host that supports the latest Asp.Net technologies, 3.5, AJAX, SQL2008, IIS7, etc... and also allows me to have unlimited (thousands) of domain names pointing to my single account. Rackspace Cloud Sites and M6 hosting plans seem to support this. Are they good? Anyone better? A cloud that was geographically redundant would be ideal as I plan to have plenty of international traffic so I want my domains to be fast in the US as well as hungary, china, etc...

 

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Anyone?