I followed the wiki:
I uninstalled Adobe Flash in the Maintenance, restarted Finder, then moved a copy of Tiger CoreAudioKit.framework over to my Documents folder (I took it from my OS X Tiger install disc with Pacifist), and then reinstalled Adobe Flash and then Restarted the AppleTV, as instructed…
I still cannot access the HBO website with Couch Surfer, as it claims it needs Adobe Flash v9.0.24 or higher installed and Safari v2.03 or higher; but this failure may be due to some other problem than Adobe Flash…
What is an example of a Hulu feed that requires Adobe Flash so I can see if the install worked corrected?