TFS in the cloud looks promising http://tfspreview.com/
Regardless of the TFS service or Sauce Lab, keep in mind that the service frees you from having to maintain a CI / Test server in your home. This does not magically generate tests for you. You are still responsible for the development and coding of many tests. This is where enormous efforts and learning curve will occur.
(Speaking of the learning curve, Selenium is much more manageable than the Ms-encoded ui-test. Wait to influence the company's decision ...)
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