This article is from the Ergonomics and Typing Injury FAQ, by Dan Wallach email@example.com with numerous contributions by others.
Marquardt Switches Inc.
2711 Route 20 East
Cazenovia, NY 13035
$179 for MiniErgo, $125 for external numeric keypad.
The MiniErgo is a split keyboard system with no numeric keypad (keypad
available separately in August). The two halves are fixed at about a 30
degree angle, to approximate the angle of your arms when you hands are in
QWERTY home position. The slant is approximately same as standard 101-key
keyboard, but the middle is raised. They've moved the cursor controls into
the gap between the two halves. A Fn key is used to access an embedded
keypad and PgUp, PgDn, Home, and End.