Music-software-reviews.com now has a sound editing software comparison chart available that includes Audition 2.0. You can see at a glance differences between 1.5 and 2.0. The chart seems to line up better through Internet Explorer than through Firefox (my default browser).
That site also has a nice music glossary that describes some of the features

A vocoder basically makes a musical instrument or sound effect talk like you (or mimic whatever you use to modulate the carrier wav, your voice). Adobe Audition 1.5, my favorite editing program, comes with a vocoder in the multitrack section under effects. Here’s a vocoder video tutorial by Jason Levine. It’s part of

Building up a production music library is a good idea if you routinely provide full voice production services, mixing voice, music and maybe some sound effects. You can get a good start to your royalty-free production music library by visiting Lazertrax.Com. They have a 14- CD collection with a variety of tempos, and they provide