Hi Dave,
> Is anyone working on ports to some of the embedded ppc communications
> processors like the 8572?
Check out Rafal Jaworowski's talk at BSDCan '07:
http://www.bsdcan.org/2007/schedule/track/Embedded/31.en.html
The code is in the e500 p4 branch:
http://perforce.freebsd.org/branchView.cgi?BRANCH=e500
later,
Peter.