Nokia's Meego division has funding until June 2012 at least, it is not certain what they'll do after that. I expect they'll be able to get an update or two out before then, but I wouldn't count on anything after then. That doesn't mean Nokia will stop working on Meego by that date, it just hasn't been decided yet.

IMO, you should buy the N9 for what it is when it is released, then any updates/improvements are a bonus, I think it is a bad idea to buy something hoping its flaw will be fixed with a future update.