We were early adopters here, of both Exchange 2000 and Blackberry 2000. We've been using it since the beta release of the Blckberry MMC. Works Great. The install process was a bit cumbersome, and no documentation was available, the RIM tech support was great, well the 1 guy they had who knew the Exchange 2000/BB integration, other than him the other tech support people really had no clue. I would think they now have accurate documentation and a cleaner install process. We are running one Blackberry Server, and it fully integrates with our Exchange 2000/AD environment. It has it's on MMC snap-in and adding, deleting users is a snap. Slightly different than on Exchange 5.5 but still fairly simple. Haven't had a problem with it and it's going for almost a year now.