Here's a fun site: the Fantasy Film League.
The rules are simple: you have $70 million to spend on one director and six actors, which you choose from a long line-up before the 'season' starts. When the season begins, you earn virtual money each week depending on the real-world box office returns of your chosen stars' movies.
Seasons last a whole year, and the next season starts in 6 weeks time, so if you sign up and choose some stars before then, you'll have a year's free entertainment watching the performance of your own Fantasy Film.
This was my attempt for the last season, which started in July. I'm surprised that it's actually doing pretty well - it's currently ranked 146 out of 2048 films. In other words it's doing better than 92% of the competition! I wonder how long my luck will hold.
Give it a go... it's free, there's no catch, and it's good fun.
I can feel the fun starting already :)