Just installed my Ubuntu 11.04 - 64 bits, and decided to install flash. I thought to install the Romeo-Adrian Cioaba script that I published as
Install Flash in Ubuntu 10.04 - 64 Bits.
I decided to update the script to install the last available flash version. The newer version that I found is Flash Player Square 10.2.p3.
Give it, execution permission:
$ chmod +x native-64bit-flash-installer.sh
I commented the line that create a symbolic link to XUL-Runner, because I couldn't find it on my computer. If you have any problem, let me know.
Tested and working!
There is a Flash version on Ubuntu repository. (It is older and I can't guarantee anything about it. But it is there)
$ sudo apt-get install flashplugin-installer