Are IBM UltraNav keyboards OS X compatible?

Hi,

I used Macs all my life until my school made me buy a PC. Now that I'm about to graduate, I can't wait to buy a new Mac. The only thing I will miss about my ThinkPad is its amazing keyboard, specifically:
1. UltraNav with scrolling TrackPoint (that little red dot) and touchpad.
2. The webpage back and forward keys nestled on top of the left/right arrow keys where other keyboards just have wasted space.

IBM/Lenovo make external UltraNav USB keyboards with those features. Does anyone know if IBM's keyboards will work in Mac OS X? If so, do all the features work? If OS X does not support the TrackPoint and forward/back webpage buttons, is there any third party software or homemade fix that would allow me to enable those features?

Here's a photo of one of an UltraNav keyboard: http://www.flickr.com/photos/tkyte/206453843/sizes/l/

Here are links to the specific UltraNav keyboards I would buy:
http://www.amazon.com/IBM-USB-Keyboard-UltraNav-31P8950/dp/B00009APTK/
http://www.amazon.com/IBM-31P9490-Keyboard-Thinkpad-Black/dp/B0002PUIAA/

Thanks for the advice!