That's funny; while I really admire the butterfly design I don't really see it as addressing that specific complaint. It's still got the thumb keys in the same plane as the Ergodox, so as far as I can tell it shares the one minor complaint I have with the Ergodox.
The AcidFire Nexus design linked elsewhere in this thread attempts to address this by dropping the thumb clusters to a lower level, which looks like a really great idea. The only other design I've seen which addresses this problem is Oobly's: http://geekhack.org/index.php?topic=49721.0
The AcidFire Nexus design linked elsewhere in this thread attempts to address this by dropping the thumb clusters to a lower level, which looks like a really great idea. The only other design I've seen which addresses this problem is Oobly's: http://geekhack.org/index.php?topic=49721.0