Proportional per time period:


Take a time period. (lets say 24 hours)

Then let everybody mine that time period. After that time period you say how many blocks have been found and devide this by the total shares that time period and multiply it by the shares per user.

This has a big benefit to smaller miners because in the current Proportional pools they have no chance of getting any share for the blocks that take less then one minute.

The other benefit is the fact that you would only have to update everyones balance once a day. (or maybe still have some expected payout)

This method also deals with pool hopping.