there's new model of the Truly Ergonomic Keyboard
they are switching from Cherry MX switch to Kailh keyboard switch. Kailh keyboard switch is just Cherry MX clones, made by a company in China. see http://deskthority.net/wiki/Kaihua_PG1511_series. I'm guessing it's not that much different from CHERRY MX.
looks like quite a few keyboards are using the Kailh switch. Supposedly, the Cherry MX has supply problems.
they also have some other minor changes. The ⇧ Shift key is now in conventional position. Ctrl is now at conventional keyboard's Caps Lock position. vim ＆ emacs hackers overjoy! The HYPHEN-MINUS - and LOW LINE _ key are now in the middle, replacing the Tab ↹ there. The Tab ↹ is moved to the upper left corner. And upper right corner has a duplicated ⌫ Backspace key.
Overall, the key layout changes are now more conventional. People really don't wantto change habit. The new layout makes it easier for people to adopt.