Google've released a new version of 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 screen, one click away, no matter how long the email is," explains Google.
Don't remember what prompted the most recent email in a thread? Now you can view previous message content more easily, just like in desktop Gmail. Tap "Show quoted text" to reveal previous message.
Finally, this version has limited support for Priority Inbox. If you've enabled Priority Inbox via desktop 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.
It requires Froyo (Android version 2.2), and is available on Nexus One, HTC EVO, Motorola Droid 2 or Motorola Droid. You can get update from Android Market (just scan the QR code below).