Market Enabler only supports up to Version 2.1, and only on some devices... I'm using an Acer Iconia running Android 3.0 and Market Enabler is most decidedly NOT working for me... the latest update of the Nook app (2.6.1) is, of course, the one which incorporates support for Android 3.0, so as you can imagine I am quite interested in it... if I can only get a hold of it. I've also tried pushing it to my tablet using AppBrain but that does not work either.