Remember that new T-Mobile Sidekick Unlimited plan we told you about a while ago? Well it seems that T-Mobile has another trick up its sleeve. In addition to changing the price point from $20 to $19.99 (yeah, we’re serious), the company is also set to include unlimited MMS. Sure, it sounds like a feature that should have been added years ago, but keep in mind that the upcoming Sidekick Slide and Sidekick LX are the first handsets in the Sidekick family to be MMS-capable. Any new customers that buy an LX or Slide out of the gate will be automatically placed on the new Sidekick plan, but existing Sidekick users that upgrade devices will have to manually migrate to the new add-on. Anyone else getting way too excited for the October upcoming launch?