One of my neighbours has a 997 Turbo S and the 6am warm up procedure seems to be start, pull off immediately, at the top of the road (i.e. within 20 seconds of pulling away) floor it, then floor it out of the next junction and repeat until the car's about two miles away and you can't hear it anymore. I don't remember exactly what the problem was but it's already been back to Porsche for some engine work.
Back to Mazdas, someone in the MX-5 world is gauging opinion on fitting RX-8 engines to MX-5s as a business. It's an interesting idea but I'll stick with my plan to do some light head and cam work and put individual throttle bodies and a plug-and-play ECU on my MX-5. I suspect it will go just as well and cost a lot more but possibly not sound as good!