Upgrade USB

Dear all
I am wondering if I should buy Macbook pro now or later as I hear that USB 3.0 spec has been sent to apple last June. If I buy macbook pro now and it release in next month I will regret for buying too soon.
Has anyone got experience of upgrading USB components through Apple service? How much would it usually cost and how long would it take?
Does Apple do upgrade service in UK/Europe as well?
Many thanks for answering the question!!!!

Thanks for the information from you two, especially from Templeton Peck. I understand that waiting is not a good solution, and I will always give a go. If a new product come out, simply sell the old one and get the new one if the budget is there.
Another question here from me is, if you have experience selling old Mac machines. Where will be the best place for selling second hand product? Is there any standard pricing rules?
I am now using mac mini and simply thinking for the benefit of the mobility a MBP can give me. SO, I might just go for a 17" model and get rid of my young mini (just one and half year old). Thanks again.

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