I got to see one of these in use at field day (used by one of the creators). They're pretty slick. Made me put one on my list as well.
I'm trying to learn CW (copy 20wpm) before I buy a digital interface for my radio though. I don't want to be lazy about it. (though its worth it to note that the NUE-PSK boxen don't do CW (or at least they didn't at field day). The guy that had his there explained they're going to add CW soon.