Gingerbread may not be a very likely option, but T-Mobile myTouch 3G Slide users can now get a dessert of another sort (albeit a slightly stale one), as the phone has finally received an update to Android 2.2 (a.k.a. Froyo). Unfortunately, there's apparently no over-the-air update planned, and the software required for the installation is Windows-only, so anyone with a Mac looking to upgrade will have to find a PC-using friend willing to help them out. If you're all set to go, however, you can download the update from HTC at the source link below.
[Thanks, Frenchy]