I'm using an iPhone 4s now, mostly because I'm a Mac user and the wireless syncing of contacts and calendar is addictive. But I'm a 10-year BlackBerry addict and I'm keeping my 9930 in the charging cradle right next to my iMac, just in case.
RIM still has 80 Million users and growing. It's just that they're growing at an anemic pace compared to Android and iOS. And that's chasing away the developers which is the most troubling thing to me.