Existing users (and lets face it, we all use Adobe Reader) can check for updates by selecting “Search for updates” from the Help menu.
If you are using an earlier version of Reader, like Reader 6 or even Reader 5, its time to upgrade! Reader 7 is fast! It also allows you to view 3D content, Electronic Forms and participate in review cycles with users of Adobe Acrobat Professional.
very cool pdf reader 3D! too