So glad to have found this site!
I'm finally having my first Kinesis Advantage 2 shipped over here, plus a Logitech 850 to plunk in the middle of the keyboard, to go along with my Kensington Trackball.
The KA2 will be replacing my (8th!) MS Ergo 4000 keyboard and boy, it can't get here fast enough as the wrist/elbow pain has gotten worse.
Looking forward to modding the keyboard at some point as well -- adding a real trackball and palm buttons (didn't even know they existed) would be awesome.
Happy New Year to All!