Hilton has some good and bad...they have created some new hotel categories, and rewards needed have gone down to redeem for free nights.
eg. Level 1 used to be 7,500 points and it has now gone down to 5,000 points to redeem for a free night.
http://hhonors3.hilton.com/en/promotions/program-changes/english.html
On the other hand, it has created peak seasons, so rooms at some hotels will cost more points depending upon the season of travel, but most hotels have seasonal pricing (Disney, anyone?), so I wonder how it will shake out?
All of this will take effect in the next few days, so most people aren't going to be able to take advantage of the old levels at Hilton.
Tiger