Mailing the story:
One Year Later: Adobe Abandons 64-bit Linux Again
...once again there are known security vulnerabilities in the now eight month old beta and no patches are available. In addition, the community forum page for discussing Flash Player "Square" has been deleted from the Adobe Labs website. If Adobe is continuing development on a 64-bit version of Flash Player they are not sharing any information with the public at this time. For the time being Adobe has effectively abandoned 64-bit Linux.