I installed it and it isn't listed in the App drawer, but it is listed in the Settings / Manage Applications as Adobe Flash Player 10.1. I was able to move it back to the phone from there. However, when I went online and downloaded a Flash Video .swf file, the Ally is unable to play it. So how is this supposed to work exactly?
Edit - I just checked the thread for this download over on XDA, and did not find anyone saying it worked on the Ally.
its not supposed to be listed in the app drawer, its not on any phone with flash, it doesnt behave like a normal application. and i've used it for tinyshark, which is a grooveshark browsing application that definately REQUIRES flash, and its worked fine. ive also surfed several sites with dolphin browser HD, all youtube vids have worked, miniclip games, and grooveshark's full site... and i didnt see anybody say that either, i believe i was the first ally user to test it, and its worked fine for me.. i apologize if it doesnt work for you, because ive been down that exact road thousands of times