In a minor update to the official Gmail app, Google has addressed one of "the little things" that have been plaguing Android since the beginning. In this case, a lack of uniformity for copying text.
In all previous versions of the Gmail app, a user would have to press Menu, More, and then Select Text. Fortunately, this update fixes that issue by making copying text the same as in the Browser or a textbox: by long pressing it. It's not a huge addition, and is only available for those with devices running Gingerbread, but it is definitely a step in the positive direction.
The update also brings the ability to sync custom label colors, as well as some minor bug fixes.