About 2 months ago I bought the CS3 design premium (student addition!!) mainly for Illustrator, InDesign and Flash.It came in the post a few days ago so i haven't had the chance to look through it completely. My first impression of it was not much has changed. And it hasn't.
There are some changes that become very handy whilst working with lots of shapes, text and stuff like that. The two most handy features i think are the Live colour - which is like the bit on Kuler where you can make your own colour - and the isolation of objects outside when your'e editing a group.
There are some other small changes such asannother live trace feature, a crop mode (haven't discovered the use of that yet) and easy integration with Flash.
On the whole its a good product and worth the buy.