Mike, I'll quite happily write a walkthrough of a port (probably one s:button or s:link), but I really want to see what's in the reference manual for the CDK first ;) I've been guessing mostly in doing the port ;) If you are interested you can see my current effort in Seam cvs and compare both old and new source code.
Sergey, did you get my email?
Not yet :-(
A bit late, but hey ;)
http://pmuir.bleepbleep.org.uk/2007/04/porting-seam-jsf-controls-to-a4js-cdk.html