I was able to run Ubuntu Linux on Acer A500 Iconia but not really what I expected. First of all, its not native you use VNC Viewer to launch it. Biggest drawback is that you have to connect to a PC to boot up Ubuntu if you restart the Iconia tab.
Oh well... Gonna look into more hacking that can give me that sweet taste of victory.
For anybody who wants to try it hit the link below for the guide from Androlinux;)
Androlinux