I'm starting up a brand new project using VS2010 and Silverlight 4. This is my first Silverlight project and I'm at a loss as to what tools I should use for both mocking and unit testing. There's Rhino.Mocks 3.5 for Silverlight, but the author marked it as an alpha release. Moq claims Silverlight support, but I've not used it before. As far as unit testing, there are a few options, but a lot of the information out there seems a bit dated.
So what are the best unit testing tools to use on a new Silverlight 4 project?