I have listed the patents in my blog post on this:
http://fosspatents.blogspot.com/2011/03/microsoft-sues-barne...
1 of them was previously also asserted against Motorola. 4 of them weren't.
Since Microsoft already has 23 patents in suit against Motorola, Barnes & Noble will know that the 5 patents asserted today are but a small selection of Microsoft patents allegedly infringed by Android.