Minor update to the Retina MacBook Pro expected this week.
Apple Beginning Back-To-School Promotion Monday? [Announced]
This information roughly parallels a recent ThinkSecret report also claiming that the promotion will begin on Monday. ThinkSecret, however, believes that the rebate will be $150.
Update: As rumored, Apple has announced its Back-To-School promotion. Qualified education individuals who buy a MacBook, MacBook Pro, iMac, or Power Mac G5 and an iPod will get up to $179 back after rebate. More details are available at Apple's site.