You don't think 500K is a bit steep? It took me a month with significantly more than average hardware to get to 500K. A dedicated folder with an average computer would take months to earn a badge.
Yeah, I was just going to say this.
I mean, 24/7 folding on a midrange GPU like a 9800GT that gives ~3500-4000PPD is still looking at 5 to 6 months of folding before getting a badge.
And forget about those of use who CPU fold, even on a dual-core your looking at over a year of 24/7 folding. A decent quad will get you down into the 5 or 6 month range(my X3370@3.6GHz get 3600PPD). And that is 24/7 folding, which not everyone can do.
I really think 500K minimum is going to alienate a large number of people. I agree the badge should only go to members actively folding for TPU, but it should be given to anyone that is actively folding for TPU, I know detecting this is possible. Everyone should be encouraged to fold, it shouldn't be about the points, once it becomes about the points, you have lost site of the true goals and reasons behind Folding@Home.
Edit: Check out this page:
http://folding.extremeoverclocking.com/user_list.php?s=&srt=1&t=50711
The 24h average is a pretty good indicator of active folding. If production drops off for long enough, the 24h average drops to 0, even for people with rather large scores. Plus it gives people a little bit of a buffer in cause they have an issue that causes them to stop folding(hardware failure, vacation, etc.) so they don't lose their badge right away, they have a little time to get back up and running.
I believe the 24h average on that page is calculated by the last 7 days of production divided by 7, so basically people would have had to be active in the last 7 days to keep their badge. Go inactive for 7 days or longer, and you lose the badge.