It might be time to invest in a better umbrella, as over the last few days it seems as though pigs might be taking flight. It's not so much that Adobe is releasing a 64-bit Linux alpha version of Flash, it's that Adobe is releasing the Flash alpha for Linux before it releases versions for any other operating system.
For sure it is a demonstration on Adobe's part that it truly is serious about Linux support. It's clear though that Adobe has more to gain, given that Linux is the system with the edge in 64-bit support and features native 64-bit browsers.