How does this sound to you guys? You'll be able to submit a ballot of upto 100 movies, using this scale:
81-100 = 2 points
61-80 = 4 points
41-60 = 6 points
31-40 = 8 points
21-30 = 10 points
11-20 = 12 points
6-10 = 13 points
5-2 = 14 ponts
1 = 15 points
I think that gives a healthy mix of points towards the top of the ranking, but doesn't hurt the ones at the bottom of the rankings too much.
It's open to suggestion of course, but I think that's the route I'll be going down.