I had a huge problem getting the Swype beat working with UD 2.1.0. I think part of the problem stemmed from the Droid 2 Swype I had installed from the Ultimate Droid extras, that was no longer there in UD 2.1.0.
I downloaded the beta (I'm in the beta) and every time I installed it, it kept telling me Swype was configured for another device. Three uninstalls and reinstalls and I could not get Swype to work.
On the fourth try, before I uninstalled, I chose the option to clear data and then uninstalled and reinstalled.
Fourth time was a charm. Swype fired up and worked!