Can't wait to get some "hands on" time with this device. 
According to a T-Mobile press release the Sidekick LX is now available for pre-order online for existing T-Mobile customers at www.sidekick.com. It is available in two colors, carbon and orchid. Here are some of the features on the new device:
T-Mobile Sidekick LX features include:
via PinStack.com - Smartphone News by azstar on 4/20/09
T-Mobile Sidekick LX features include:
- Integrated social networking application bundle includes Facebook, MySpace and Twitter
- High-speed Web browsing with 3G support
- Built-in GPS support with Live Search
- 3.2-megapixel camera with autofocus and an LED flash
- Ability to record, play and share videos
- Share recorded videos via e-mail and upload videos to social networking sites
- Watch videos on YouTube via the web browser or on MySpace
- Carbon or orchid finish
- Music player with streaming audio and streaming RTSP video
- 3.2-inch F-WVGA screen with high-definition LCD technology with 854x480 resolution
- Support for personal e-mail, SMS, MMS, instant messaging (IM)
- Clients include AOL® Instant Messenger, Windows Live and Yahoo!® Messenger
- Iconic swivel design and full QWERTY keyboard (manufactured by Sharp)
- Intuitive user interface with Quick Find to search across all applications
- Network Address Book
- Included 1GB microSD™ memory card
- Bluetooth® 2.0 with A2DP supports stereo Bluetooth and Bluetooth file transfer to other Bluetooth devices including photo printers
- Dimensions: 5.1 x 2.4 x 0.6 inches; 5.7 ounces
- Quad-band GSM/GPRS/EDGE worldphone (850/900/1800/1900 MHz)
- Dual-band UMTS/HSDPA (AWS Band IV & Band I)
- 1250 mAh Lithium Ion battery
- Battery: 3G — 3 hours talk time, 6 days standby; 2G — 5.5 hours talk time, 8 days standby
- Software and services provided by Danger, a Microsoft subsidiary.
- Shortly following launch, T-Mobile plans to make available Exchange Active Sync support via the Sidekick Download Catalog so customers can stay virtually connected to work.