Does Arduino ADK shield for android, serves like a regular USB host shield?
Ok, despite the abscense of an answer I've just purchase the ADK USB host shield and try it's functionality as a regular USB host with great results, at least on the project in which I'm working ...

What I really like about it, is that it can also be used with android, so if you are thinking in buying an USB host I think this is the way to go!