Connecting to Gmail via the browser will give you copy and paste functionality. I bookmarked the gmail site and then created a bookmark shortcut on my home screen. Works just as well as the Gmail widget so far.
*EDIT* The stock Gmail widget is much easier for quickly checking email, but I think I will keep the bookmarked shortcut for times when I need to copy text.
I wish that the integration with Maps was present in the mobile versions of Gmail. I would love to be able to highlight and address in an email and open it up in Maps..or get navigation directions.