Do not go for the Maltron - it is not worth the trouble in getting it. Get a Kinesis instead - better supported, more standard, and lots of accessories. And you can reprogram all the keys by yourself. And have hardware macros, too. And footswitches. And yes, I own one, and it's great (I own one for about 4-5 years now).

Christian Lemburg
Brainbench MVP for Perl
http://www.brainbench.com