Well I just got Photoshop CS3 Extended and was amazed with all the new stuff, But the thing I love most is the 3D Layers.
It allows you to import certain file types and you can actually texture them, and do loads of stuff with them.
Here is 2 video tutorials on them

Even if you dont have PS-CS3 Its pretty neat to see how much it can do.
http://www.digitaltutors.com/digital_tutors/video_details.php?v=916http://www.digitaltutors.com/digital_tutors/video_details.php?v=917The second 1 is more indepth with texturing which i luv!
Can't wait until some 1 creates a Md3 plugin! (If any 1 ever does :x)
Thumbs up to Adobe for the great improvements in CS3 (Video Editting, 3D Layers, Smart Filters, etc.)