I have an idea, that could be fun to do.
I was part of one the Tournament pool yesterday, it was a lot of fun.

I was thinking about a few things.

I think it could be fun if we made a pool for a high roll bet, lets say 1 BTC.
The players can then buy shares e.g. 0.005 per share.

Then would it be sort of an event when the play will be made. 

Another thing, I think the tournament would be more fun if it was a random draw amoung the one betting 0.1 BTC instead of the highest profit.