My thoughts...
There is no way I'm going to miss Regionals. The prizes are just too big.
After that, however, it's a completely different story. I'd be completely willing to help judge (and not play) if it meant getting into Worlds.
The big question is, what rating do you need to be 'guaranteed' a trip to Worlds? My expert analysis says 2000 is the aproximate cutoff line (for Masters in NA).
In the 2004-5 season, only 3 people exceeded a 2000 rating, and 2 of them did it at Worlds (Jermy and Ross), so their records probably don't count if you're trying to account for ratings BEFORE worlds.
In 2005-6, there were 5, although 1 doesn't count because she apparently didn't actually attend any premier events.
So, the past 2 years lead me to believe that 2000 will be the aproximate cutoff this year.
However, there's 2 final things we have to consider:
1. There will be more events this year, with more chances to win points, scores will likely go up.
2. On the other hand, people will be alot more serious about even the most meaningless victory, likely driving scores down.
There is no way to tell how those 2 things combined will effect scores.