I know Hero & Moment owners can get 2.1 on their devices now thanks to the developers over at XDA. But for those of you who don't feel like voiding your warranty looks like the wait is almost over. HTC Hero, Samsung Moment 2.1 Update Now Coming Early May | Android Phone Fans Sprint's HTC Hero and Samsung Moment Android 2.1 updates on track for early May? -- Engadget Mobile
The Moment 2.1 update is officially out, latest rumor I heard about the update for the Hero is next Friday, the 21st
What a difference an update can make. I've had it installed for several days, it's like a completely different phone. Much, much faster.