It’s been a question floating out there with no answer for a while now, and I actually posted a response on the Labs Forums. I’ll repost it here so more people can find it/reference it:
“Based on the short time frame between announcing Flash Player 8 and Flash Player 8.5, we decided to work on developing a Linux version for Flash Player 8.5, which will ship after the Windows and Mac versions.
We have not yet announced plans to develop a 64-bit player on Linux.”
*** Closing Comments ***
Flash Player 9 for Linux shipped in January 2007. This is a really old post. Please check recent postings for current/relevant info and updates.