Audible Manager seems to operate about the same under Crossover 3.0. The biggest problem seems to be display-oriented. Buttons on the toolbar are not displayed until the mouse hovers over them. And, even then, they have no titles. The advanced display of Audible content doesn't work -- only the simplified display lets you see your content.
The CD Burner is not recognized. No real surprise there.
The Audible Player starts, then locks up.
For now, I have to say that Audible Manager is not working under Crossover 3.0.
Mike