This morning I performed a MSDN WebCast on LINQ to DataSet. I hope it was useful for people, and that I was able to answer all the questions sufficiently. If you missed the live show, you can always catch the "TiVo" version (i.e., on demand webcast).
I'll update this post with the URL once it is posted. Here is the link to view the webcast. If you have any feedback, either on the content or presentation, please feel free to let me know.
I promised that I would post the samples, and so here they are. I reworked the first three samples to that they would work with the Beta 1 bits. The LinqDataView sample will not work, so I left it out of this sample set, but I will post it again once the bits are released. I didn't include the Adventure Works database, as there is no reason to bloat the download! Please let me know if you have any problems.
Update: If you're having problems with getting the sample to work with Beta 2, please following these instructions provided by Ben Hoelting.
1. Download and install the Entity Framework
2. Add a reference to System.Data.DataSetExtensions