The third-party app experience has always seemed like an afterthought for RIM. Lousy selection and a half-baked install process are just some of the issues plaguing BlackBerry owners and developers, but there's no blow stronger in the app world than when a dev drops support for a platform, after dedicating the resources necessary to bring a product to market in the first place. That's exactly what Seesmic has done with its popular social media app -- effective June 30th, the company will drop support for BlackBerry, "in order to focus development efforts on (its) most popular mobile platforms." It goes so far as to suggest that users "try out Seesmic for Android, iOS, and Windows Phone 7," which would of course mean replacing that BlackBerry with another, more app-friendly device. The move doesn't necessarily indicate that other devs will follow suit, but if jumping ship does become a trend, it could put a significant damper on RIM's future earnings, to say the least.