Few days ago Adobe Flash Player 11 Beta 2 has been released, you can check the release notes, features, changelog and installation instructions Here. In this post installation instructions for Adobe Flash Player Beta 2 64bit using PPA.
We will use sevenmachine PPA we used earlier for installing Adobe flash player 11 Beta 1 in this post Here.
Install Adobe Flash Player 11 Beta 2 On Ubuntu 11.04 Natty Narwhal and Ubuntu 11.10 Oneiric Ocelot
sudo apt-get update
sudo apt-get install flashplugin64-installer