Adobe first experimented porting its products to Linux back in November of 2004. Since acquiring Macromedia in mid 2005, Adobe has also been committed to porting Macromedia's assets, such as Flash, to Linux. The most recent milestone in this process was the synchronization of releases between Windows and Linux with Flash Player 10.
Though equality had been established between the operating systems, this release did not calm users. Still, a common complaint amongst users of all operating systems was: Where is our 64-bit version? Users of 64-bit Linux distributions were required to use the NS Plugin Wrapper or install a 32-bit browser in order to see Flash. Other operating systems had to use a 32-bit browser as well but these come pre-installed.
Today, Adobe answered this problem with an alpha version of their 64-bit Adobe Flash Player 10 for Linux operating systems released on their Adobe Labs website.
Release notes and a FAQ for the new driver were also made available. I mention the FAQ as it answers one question that comes immediately to mind: Why aren't the Windows and Mac 64-bit alpha versions available on Adobe Labs?