Web sites that publish student work:

Young Writer: The Magazine for Children with Something to Say
http://www.mystworld.com/youngwriter/index.html

The Young Writers Club
http://www.cs.bilkent.edu.tr/~david/derya/ywc.html

The Writing Den
http://www2.actden.com/writ_den/

Young Writer's Clubhouse
http://www.realkids.com/club.shtml

Student Publishing on the World Wide Web
http://www.edu.yorku.ca/~TCs/~RFouchaux/stdntpub.htm