I wish Illustrator had a Package feature like the one in InDesign. Wouldn't it be great to have a menu command that collected all linked graphics and fonts for an Illustrator file? Until that day, you can do two things:
1. If this kind of functionality is important to you, let the Illustrator team know by submitting a feature request at http://www.adobe.com/support/feature.html.
2. Check out third-party solutions...
