RIM (s RIMM) desperately wants its BlackBerry devices to become more than just email. It wants them to become multimedia hubs, thanks to a bit of iPhone envy. And video is getting some serious attention. Yesterday, Liz had the scoop about their new TV show streaming service. And now Sling Media, a place-shifting gear maker, reported that it’s releasing SlingPlayer Mobile for BlackBerry, which is now available for over-the-air downloads for $30 a download. Yikes…that is expensive. The app — for now — works only when using the Wi-Fi connection and shuns the 3G connections. As a result, the software works only with many of the newer, WiFi-enabled BlackBerry devices, such as the Bold, Curve 8900 and Pearl Flip 8220. Sorry Storm owners — no Sling love for you guys. These announcements are ahead of the likely launch of the BlackBerry App store.