Just an update on the keyboard issue...
I popped the key off to see if I could notice anything, and it kind of looks like the silicon/rubberish material under the key was made slightly higher than on the other arrow keys (probably just a random manufacturing defect). The applecare phone number didn't help at all though - not only did I have to wait like a half an hour to get through, but the guy just said "we'll send you a box or you can go into an apple store", he took note of my problem, then tried to sell me the applecare warranty (his sale pitch made it sound like my computer wasn't even covered right now...I had to say to him "uhhh...this does have a 1 year warranty on it if I bought it new like 3 days ago, right?")
Have any of you had a macbook keyboard replaced at an apple store? If so how long did it take them to do it? Because my guess is that that would be all I would need, and since I have to travel an hour and a half to nearest apple store I wouldn't have a lot of time for them to replace the computer and transfer my stuff over or take the whole computer apart to get to the keyboard (basically, I can't keep it there overnight).
Also, another thing I don't know if I should be concerned about, when I press down, not really hard, but with a little pressure, on any key of the keyboard, I start hearing a buzzing sound. Is the keyboard bumping into a fan or something underneath?
As for your problem portuglish, I would probably contact apple. My new macbook has been staying relatively cool (like 30-60 degrees max). If yours is over 100 constantly, then that's probably not good. Furthermore, if your having problems with your battery, that could also mean you have a faulty battery, and that could be a safety hazard not only to you, but also your computer. Definitely get it checked out, especially if the battery is getting excessively warm or anything of that nature.