The Sidekick LX 2009 with 3G and Flash is available for pre-order to current T-Mobile customers only. The official release date is May 13, 2009.
There will be an official New York launch on April 21, 2009.
If you are a current T-Mobile customer and want to order your new Sidekick LX go here
(information and picture source: CNET & T-Mobile)