Hey, I'm a college student and I took advantage of this promo last summer to pick up an iMac for my family and a free iPod touch for myself. The promo been running for a fairly substantial number of years... I'm going to go out on a limb and say at least 4-5. They've offered Minis, Nanos, and Touches, to my knowledge, and I don't think they've ever downgraded from the previous years' offering.
So, to respond to your question, the chances are
extremely good that the current iPod touch will be offered free with the purchase of a Mac, starting in the first few days of June, 2009. The 2008 promo began on June 3 and ended on September 15.
The MBP is an excellent computer for my needs as a college student. I chose my Unibody MBP over the MB primarily for the larger screen and graphics capabilities, but also because it will be more futureproof than the MB; hopefully Snow Leopard will be able to take advantage of both graphics chips when plugged in at least. You'll have the benefit of knowing for sure by the time you're looking to buy one though!
I did have an entrance scholarship, but I didn't use it to purchase the computer. Tuition is much more anyways.
Good luck, if you have any questions about the promo fire away! Here's the page on Apple's site with the relevant info:
http://www.apple.com/promo/past.html
--mAc