I found this video linked in another forum, its a pretty intersting look at the architecture of the hammer family of processors, worth a look if you have an hour or so. its from a college lecture attended by Kevin McGrath. It was on Ace's site too.
http://stanford-online.stanford.edu/courses/ee380/040107-ee380-100.asx
http://stanford-online.stanford.edu/courses/ee380/040107-ee380-100.asx