The folks over at HipTop3 came across some information on MySpace that leads us to believe that T-Mobile may be planning a launch party for a new Sidekick in October.

DJ AM, who has played for the previous T-Mobile launch parties of the Sidekick II and Sidekick 3, has October 16th blocked out for another private party with T-Mobile. This would also be good timing for the launch as well, with the holiday shopping season approaching.

It’s hard to say exactly exactly which Sidekick will be launched, the Sidekick Slide or the Sidekick LX, but HipTop3 is speculating the Slide. We get a lot of emails asking about the next Sidekick launch, so we’ll definitely keep our eyes peeled for this one.