Hey,
I''ve released 2 screencasts about Rails + Cappuccino
(http://cappuccino.org) :
http://bit.ly/CappuccinoRails1
http://bit.ly/CappuccinoRails2
They show how to create a Cappuccino interface for the Rails Weblog
Application (by Ryan Bates).
I though I might share it here too.
Best,
Thomas.