Joyce Valenza, School Librarian Extraordinare, had a great article in VOYA (Voice of Youth Advocates) about creating iGoogle pages with students.  

http://pdfs.voya.com/VO/YA2/VOYA200804tag_team_tech.pdf

Check out her blog,  NeverEndingSearch, for lots of other great 2.0 ideas.

http://www.schoollibraryjournal.com/blog/1340000334.html