October may bring a minor processor change as they did it last year too - but literally it's 100mhz which you won't notice. i.e. 1.8 to 1.9ghz.
It has USB 3.0, it's BT 4.0, its the newer magsafe, so there really isn't anything else to change on it this year.
I'm selling my MBP in November to a friend to replace it with an Air - I'm going for the i5 1.8 with 256 SSD and 8GB ram. I really didn't notice the change in my last i5 to i7 upgrade and with the SSD it will be faster at most tasks than my current machine.
You have no reason to wait what-so-ever! BUY IT!
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It was just updated but if you're that concerned wait at least two more weeks so you can at least exchange or return if Apple does release something.
Just wanted to quote you on your choice of the GSIII with your apple devices - how do you get on with that blend? I bought the S3 but I took it back after a few days because of it's appaling connectivity with OSX. How do you get on?
Cos honestly, if this years iPhone is as crappier update as the 4S I'm gonna skip it. Unfortunately I love my iPad and MacBook too much to go back to Windows so how do you bypass the android/OSX issues?