2010 will see an increas in park entrance tickets, from £15.95 to £16.50. They haven't increased the prices for a few years now, so it was kind of due. Lets just hope they will jusify an price increase ;)
Also, next year see's them trying something new, with 'open' and 'dated' tickets. Basically the 'dated' tickets are just the normal online booking tickets, you recieve the usual £2 discount, its just a different name for it I guess.
The 'open' tickets seem pointless to be honest, it only saves you 50p!
Lets hope there's plent more '2 for 1' offers around next year, as well as the return tickets for £10!