I've updated the release files on Farseer Physics Engine CodePlex site. The updated files support Silverlight Beta 2.
I also added and build that supports the XNA 3.0 CTP (This is the version that runs on Zune). This build was done by Jeremy Bell and I have not tested it yet.
I'll do a more formal release of all builds once Silverlight and XNA 3.0 are finalized.
-Jeff