For Education purchasers (students and teachers), if you buy a new Mac alongside an iPod you get a $199 postal rebate (the cost of an entry level iPod Nano). This includes the usual Education discounts on Mac systems. Available at the online store and Apple Authorised Campus Resellers.
From the site:
Shop for a Mac.
Choose a qualifying Mac.Buy an iPod.
Purchase a 4GB iPod nano — or any qualifying iPod — with your Mac between 23 January and 18 April 2008 and get $199 back after postal rebate*.Submit your rebate.
After you receive your Mac and iPod, complete your rebate form and mail it back to Apple no later than 16 May 2008.