Great news for all the people who’ve been requesting native 64-bit support in Flash: a preview version is available for download from Adobe Labs. Among other enhancements, according to engineering manager Paul Betlem,
Flash Player ‘Square’ leverages the new GPU support available with Internet Explorer 9 Beta to deliver a faster and more responsive user experience. In our internal testing, we’ve seen significant improvements in Flash Player graphics performance – exceeding 35% in Internet Explorer 9 Beta compared to Flash Player running in previous versions of IE.
Check out the 64-bit FAQ (PDF) for details on the benefits & challenges of 64-bit development. Expect to hear other interesting details soon.