signals23 has already updated almost all of his LauncherPro Plus widget themes to the newest version of LP (0.8.4.1) which includes the Gmail widget. If you were looking to keep your phone’s overall theme intact, but didn’t want to downgrade to a stock LauncherPro, you are now good to go. I chose the Blurps Blue themed LP in the screenshots above since it matches up well with the new blue Blur on Gingerbread for the DROIDX. You can download that version here.
Full set of custom apks can be found at this XDA thread.