No, not yet but I've taken a different approach.
I've diffed the standard SL kernel against the standard Lion kernel (to find out what was changed).
Lots of code to go through.
I've also disassembled the Lion DP1 kernel as well as the GM one and have written a little program to strip of the addresses.
I've diffed these together to get instruction changes in the diff.
Studying both may reveal a solution.
I'll upload the diff later.