MMO Champion reports a lot of news from the Cataclysm front. We'll let you visit their site to get the skinny on all of it, especially because of it changing and updating as they get more information, but we wanted to bring this tidbit to your attention:

Level Cap
The level cap in the next expansion will be slightly lower than expected this time around; 85.

This suggests Blizzard wants more room for expansions before hitting the level 100 cap. With less leveling to do (along with the revamped leveling listed below likely to increase the speed and ease of leveling), leveling a new race remains appealing for new and existing players alike.

Leveling from 80-85 should be a much bigger deal, the idea is to make sure that gaining a level really means something and doesn't make you feel like you just have 4 more levels to go.