Although it had already been out once before in leaked form, it appears that Sprint has finally released the official Android 2.1 update for the Samsung Moment. There aren't any live wallpapers to be found and you'll still be limited to three homescreens, but the update is said to increase GPS strength and signal strength among other improvements.
To update your Moment, head on over to the downloads section of Sprint's website and get yourself some tasty Eclair. Keep in mind that the update will wipe your phone, so if you've got anything important, be sure to back it up. If you have a Moment, let us know how your update goes!