Based on information from this page on Adobe's web site, Adobe is readying the Acrobat product for movement to version 6.0.

Many of the features appear aimed at solidifying the position of the company's PDF format and heading off Microsoft's new generic document format, slated for release with the next version of Microsoft Office.

The Macintosh version will be OS X only (10.2.2+), and the Windows version will require an NT-based OS (NT, 2000, or XP).