IDUG is the International DB2 User Group, an independent community organization of DB2 users. They have a 2010 North American conference coming up on May 11-14 in Tampa, Florida.
In my experience, conferences are a great place to learn and make contacts. IDUG 2010 North America will have 105 hours of technical sessions on DB2 and related subjects as well as several IBM-sponsored hands-on labs.
DB2 Express-C Community Team