My switch to Dvorak has also brought me to switch to ergonomic split keyboards. I bought a Microsoft Natural Keyboard Elite for work, a recently got the Goldtouch for Mac Adjustable Keyboard for home. The Goldtouch keyboard has been a big disappointment for me and I have decided to return it. The biggest problem I have had with it is the sensitivity of keys being different than what I am used to. The bizarre arrangement of some feature keys has also been an issue. I would like a split ergonomic keyboard designed for the Mac, but I have yet to find the right one. Adesso has such a keyboard but the ‘6’ key is on the right side of the split, which is not how it should be.
So the search continues. If I don’t find a good enough split ergonomic keyboard designed for the Mac soon I may just get a Microsoft Natural Keyboard Elite (which feels great) and use Mac keyboard stickers on the ‘Ctrl,’ ‘Windows,’ and “Alt” keys to give me the Dvorak keyboard layout.