Beyond the points made by the RBC, Citi, and Canaccord analysts, one other factor working in RIM's favor is that the Blackberry lineup is going to see a significant refresh over the next few months. 3G-supporting versions of a number of existing platforms seem likely - an EV-DO version of the Curve, and more importantly for RIM's bottom line, W-CDMA/HSDPA versions of the Curve, 8800 series, and maybe also the consumer-focused Pearl. Right now, there aren't any HSDPA Blackberries on the market, and the only W-CDMA models are in the outdated 8700 series. A 3G revamp could help RIM gain even more share against Windows Mobile in corporate environments, given that widespread 3G device support has been an advantage for the platform for the last couple of years. Also, there's probably going to be an expansion in the number of Blackberry models supporting both GPS and Wi-Fi - RIM only really started embracing these two technologies last year.
In addition to these kinds of evolutionary upgrades, every gadget blogger and his cousin seems to have reported a rumor about a next-gen, 9000-series Blackberry that'll be a legitimate competitor to the iPhone in the consumer market. Everyone seems to agree that 3G is part of the package, though there's plenty of disagreement otherwise. Some see an iPhone-type touchscreen interface, others see a physical keyboard that snaps over a touchscreen, other see the improvements being more software-focused, and so on. Though given RIM's interest in becoming a bigger name in the consumer space, it's not crazy to think that they'll be looking to make a splash.