Sprint has released a firmware update for Samsung Moment owners. However, in order to update your handset, you'll have to take it to one of the carrier's stores with a repair facility. How inconvenient! But it's worth it: the update improves AGPS and battery life, among other things, thouch it's still not Android 2.1, unfortunatelly.
Sprint says that "the ability to download the update directly on your Moment will be available in the near future."