I recently made the switch from QWERTY to Dvorak, during a 2 week period while I was in between jobs, and it was one of the most frustrating things I've ever done. Over a month later and I'm back up to a plodding 60 WPM (from a glorious 120 with QWERTY). Not to mention how shot my vim keybindings are!
Maybe if I eventually switch again it will be less painful, but the experience has taught me that typing is almost 100% an exercise in muscle memory.
Anyway, my point is, I wish I could be the kind of person that could type fluently in multiple keyboard layouts, if nothing else then just for the heck of it, but I'm not sure I'll ever have the kind of time to make that happen. Cool project though! There are certainly words and bigrams that are needlessly hard to type in Dvorak.