There are a few of us running PCIII on 07/08 models.
I am still working on the O2 simulator for the 07/08 models, I have had to change the design a few times. I am finding this ECU a real pain in the Arse. I hope to have my new Wide Band 2 Commander this week & will carry out some more test to fine tune things with this tool before heading to the dyno.
http://www.dynojetwb2.com/wb2_products.aspx
I am also working on the Raptor 700 ECU conversion to the XT, so I can have a higher rev limiter & fit a Dynojet ignition module to play with the ignition timing. I have done all the theory just looking for the parts at the moment.