This is not just YAPS (Yet Another Pet Store); this one is Groovy! :-) Carol has written a sample of the now famous Pet Store (check out the Wikipedia Entry) but this time it uses Groovy, Grails, MySQL Server and the GlassFish Server.

Carol's writeup has full details. Other TA entries on the topic are tagged Groovy or Grails, including the announcement about Grails in the UpdateCenter.