As others have observed, PUG submissions are significantly down as compared to previous years. While I'm sure that a lot of this is because of the upsurge in PAW/PESO/..., I really don't feel this is the time to make it harder to submit to the PUG.
It's my belief that the restrictive rules (only Pentax gear for the PUG, but anything goes for a PAW) contributes in no small way to the decreasing significance of the PUG, and if any change were proposed I'd suggest just dropping the rule. It's not as if we expect the PUG to be overrun by submissions from outsiders, after all. I'd like to see the best work from any of the list members, no matter what camera they were using that day.