Silverlight and MOSS makes me think of one man that you need to know about: Patrick Tisseghem. Check out his blog at: http://www.u2u.info/Blogs/Patrick/default.aspx
He is working with 2.0 version for Microsoft, and he and his team has alot to offer about Silverlight 2.
Here are a few web parts based on 2.0 version, and the three coolest are the Social Networking, visual how-to(acually plays movies from a library) and pivture viewer(same as visual how-to, but with pictures instead of vids).
And offcourse the article on Alex Pearce's blog is also recommended read.