Simon Arscott and Paul Westbrook, (Gmail for Android team) Say's
We just released a new version of the Gmail app in Android Market, so Gmail updates aren't tied to Android version releases anymore. Now you can get new Gmail stuff faster without having to wait for system updates. To start you off, we've improved message replies, access to quoted text, and more.
As you scroll through a conversation, your most important message actions will now stick to the top of the screen, one click away, no matter how long the email is.
Don't remember what prompted the most recent email in a thread? Now you can view previous message content more easily, just like in the desktop version of Gmail. Tap "Show quoted text" to reveal the previous message.
Finally, this updated version of the Gmail app has limited support for Priority Inbox. If you've enabled Priority Inbox via the desktop version of Gmail, you'll see an "Important" label that shows all messages flagged as important. You can even add a shortcut to "Important" to your home screen.
The Gmail update requires Froyo (Android version 2.2), so it's available if you have a Nexus One, HTC EVO, Motorola Droid 2 or Motorola Droid. (Not sure if your device is running Android version 2.2? Check here.)
Get the update from Android Market (just scan the QR code below, or click here if you're on a phone) and check out the new Gmail. We'd love to hear what you think at firstname.lastname@example.org.
Update 9/21/10 12:26pm PDT: There is a known issue where the headers don't stick properly on some HTC phones like the EVO 4G and Droid Incredible. We are working to address this.