Android’s Gmail app has been updated to 2.2.1, and subsequently leaked via the “usual” channels.
Copy-and-paste, which was quietly introduced previously, is included in this build as well. To use this feature in an email, tap Menu, More, Select text, then highlight the text to copy to the clipboard.
A major change includes a new method of “docking” the email’s header to the top of the page when scrolled. This subtle UI change is significant in terms of usability, especially when paired with the new “arrow” button that gives you quick access to Reply, Reply to all, and Forward. These items were previously listed at the bottom of the email, and would often require a significant amount of scrolling to reach.
The “arrow” button uses the new “actions bar” UI-element to show related options, similar to the “actions bar” that you see when you tap on a contact’s avatar and see various methods of how to contact that individual.
The 2.2.1 Gmail app update hasn’t officially distributed yet, and you won’t find it in the Android Market, but you can find a link to the .apk at XDA-Developers.com. From what we understand, you’ll need to be running Android 2.2 (Froyo) to be able to install the 2.2.1 update.