I have a jellybean Nexus 7 and an N9. I was never a N900 owner, but i am a bit of a tech-head. Bit senile these days, though, and have to keep referencing the how-tos cos i forget. One bit of advice from one N9 owner (lover) to another: forget what you've ever known about the N900. You dont need to know about it. Linux knowledge is helpful. Android is different, and a bit irrelevant. I dont use meecatalog, i use the Nokia store, and line commands / instructions from the devs. inception is pretty much required. and welcome back.