You can download a free beta of the upcoming version of Photoshop at Adobe Labs

The next generation of the professional standard in digital imaging, Adobe Photoshop CS3 delivers new tools and enhancements that enable you to work more productively, edit with unrivaled power, and composite with breakthrough ease and control.

Please note that a beta is, by definition, an unfinished product that may or may not include all the features and functionality that will appear in the final release. And while some may find the quality appropriate for use in a production environment, the beta is not final-release quality and should not be used for critical work.

- Richard Koman