Flash Player 9
It looks like the Flash Player 9 beta player is now available for download and includes a Linux player.... Linux users will never again have to see site messages that say "Your version of Flash player does not seem to be up-to-date... are you sure you want to continue".
Update: After installing Flash Player 9 beta, you can determine your version of flash by visiting this page. The Flash 9 beta is identified as version 9,0,21,55.