The best place to find them is on the bulletin boards run by an independent consultant, Pete Raleigh, an indie consultant for IBM Workplace Web Content Management (WWCM) projects. Raleigh started the forum after failing to find anything equivalent on IBM.com. Big Blue followed up with its own support forum about 6 months later, but Raleigh's site remains more popular, perhaps because of its firm independence. I've previously blogged about a similar, unofficial site for FileNet developers. Communities want to form around products. As you investigate the marketplace yourself, give added weight to products where you can connect easily with peers.