* bigger spread of ages. (was Cameron the oldest this year at a spirtely 32..? They are all in the same generation)
* bigger prize money (70k is a lot to anyone but I think it's possible to give up, I doubt anyone would give say 500k to charity. That type of money would be more of a motivator. i think people go in for the exposure, to get famous or for the experience, the 70k is secondary. More money at stake, I think people would be more likely to 'play the game'
* Davina and Dermot to swap roles ( i doubt Davina would stay though)
* E4 viewers can see nominations as they happen
* full screen live feeds on interactive
* get to see/hear Hms when they are in the diary room
erm...will probably think of more