I wouldn't hold my breath for a quick fix anytime soon, regardless of how much publicity you create. While I realize it is not the same problem, it took Mazda 21 months to fix the cold start rattle from the Pro5. I first complained about the issue in Oct 2001. I was told at that time they were aware of the problem ant that the fix should be out by the first week Dec 2001. In Dec I was told that the reprogrammed ecu just needed to be approved by the epa and should be avaialbe any day now. In Feb 2002 I was told the fix would be out by the end of March 2002. In April 2002, I was told that Mazda is currently resaerching the problem to determine why some vehicles are affected while others are not. At that time I demanded that my 12 month warranty on adjustments (rattles from interior peices) be extended for 12 months after the cold start rattle was fixed because I wasn't going to continue to bring the car in to have the rattles fixed untril they solved the problem that was causing them in the first place. It took another 2 months and a report to the NYS attorney general for them to issue me the warranty extension. In Sept 2002, I was told that Mazda had to scrap thier first fix due to poor emmisions and that they are determined to continue to research the problem until a fix is found. I was also told that I shouldn't contact Mazda USA anymore, that they will contact me when a fix is avaiable. In October 2002, I was told they had another ecu reprogram in conjuction with a replaced delay valve that they are currently testing with several customer cars and if all goes well will be avaiable in Dec. In Dec 2002, I was told that they were continuing with the testing and that it looks promising. If all continued to go well the fix should be avaiable in the first quater of 2003. I finally did get the fix in March 2003, after I contacted them again), 21 months after I bought my Pro5, which turned out to be a reprogrammed ecu along with the VTCS delay vavle replacement.
With the limited production run of the MPS, I think it will be harder for you guys to get a fix for the hesitation problem. While Callaway's intensions are good, Mazda is not going to listen to them anymore then they listened to Racing Beat about the MP3 clunk problem. And also due to the limited production numbers of MSP's, I don't think Mazda will worry about any bad publicity you may be able to drum up from the import magazines.
Sorry about the long post and I wish you the best of luck getting the hesitation problem fixed in a more timely manner.