buyersguide.macrumors.com isn't definitive, it only provides statistics for past refreshes. Given the sporadic schedule we could see a minor update in at any time in the next several months. If it happens in the next few months it will be very minor and will probably only address what they left out of the last (ie: screen and processor upgrade on the 13"). It's unlikely, but possible. As was said, it shouldn't hurt to wait a week. But I doubt that we will see a high-resolution antiglare option with an i3/i5 upgrade on the 13" until early next year, but by then it will be Sandy Bridge (unless Apple decides to abandon Intel).
