Naah, not annoyed at all. Bought my 15" in Jan, been absolutely flawless since. I use it a lot off battery, but never so long away from the mains that I've been forced to shutdown. Equally, I'm not a fan of non-user replacable battery's anyway.
Being a gadget fiend, I'm slightly bummed by the idea of 6gb max ram in my 2.53 mbp, but realistically I'm never going to need more than that between now and my next laptop in 3 years. Besides, it'll probably be another 12 months until 4gb sticks even approach being value for money anyway.
I'm just waiting for an affordable 500gb+ SSD, that will give me far more of a performance hike than a ram upgrade for my usage.