We hope you like hotspot hunting. T-Mobile today launched the BlackBerry Curve 8520, a media-focused device that sports RIM’s first optical-pad navigation system, which replaces the trackball. It’s so similar to the Curve 8900, though, that we’re confused as to why T-Mobile would offer both, especially since neither device offers a 3G data connection. The Curve 8520 is available in black or frost and costs $129.99, which is just $20 less than the Curve 8900. Measuring in at 4.3 x 2.4 x .5 inches and at a weight of 3.7 ounces, it’s form factor is similar to the Curve 8900′s 4.2 x 2.4 x .6 inch measurements. The new 8520 caters a bit to the media heavy user by offering media controls on the top of the phone for playing/pausing and skipping songs, but RIM dumbed down the camera from 3.2 MP to 2 MP. Like the 8900, it’s an EDGE only device, so you can’t surf at 3G speeds like you would with the Verizon Wireless or Sprint BlackBerry Tour. It does have Wi-Fi connectivity though, and you can pair that with T-Mobile’s Unlimited Hot Spot Calling Service to save on voice minutes. We’ll hold off on judging the phone before we see it, but based on specs alone, we’d already recommend spending the extra $20 for the Curve 8900. Or better yet, wait for the holidays and expect a price drop on the 8520. Update: RIM just informed us that the 8520 will also be available from Wal-Mart with a 2-year contract for $48.88. That’s a steal.