My 6 day old 2.0 Ghz macbook is outdated!
How about that huh? and the starting price of the 13 inch MB pro is lower than before. That integrated battery tho...what does it mean when it comes time to replace it? hand it in at a service centre or buy a new laptop?
Apple typically offers price protection for this exact situation. Act now -- don't delay. The time period to return the laptop is very short (about 2 weeks, maybe shorter).
http://discussions.apple.com/thread.jspa?threadID=1416015
Even if you can't return it for a new model, what, exactly is wrong with the model you purchased? You obviously thought that the features of the laptop you purchased at the price you purchased it were worth it -- are they now any less worth it? Or is it just the fact that technology marches on, and you'll always be able to get better and faster for cheaper?
While it sucks that it happens sometimes 6 months out, or, in your case, 6 days out, be happy with what you have -- there's nothing wrong with it at all, and it does everything that the new model does.
Remember: a better, faster computer does not make you a better, faster designer/programmer/surfer/etc. Don't confuse the computer's abilities with your own.
When the battery goes dead (Apple estimates it'll last you 5 years, at which point, most people are looking to purchase a new computer), then you can simply take it to any Apple store and have them put in a fresh battery for a nominal charge.