I'm in a similar postion as the OP, except the only difference is that I bought my MBP from eBay (brand new and sealed). Maybe I am being optimistic here, but would Apple take my Early 2011 MBP (that comes with Lion preinstalled) and replace it with the late 2011 version? This is a serious question, I'm quite sad of hearing about the new version which has replaced my current base 15" model which has a 256mb GPU with a 512mb GPU at the same price, especially as I was hoping to do some gaming on the machine (not interested in the CPU upgrade).
Sorry to sound like a a$$hole who's getting worked up about a slight spec bump, but this hurts having spent a long time saving up for my MBP only to find it being replaced with a newer model which has the better GPU that I was particular interested in.