Depending on what school you're going into, there's a good chance that they may have a computer store on campus that you could purchase hardware and software at a steep discount.
Also, there are a lot of b&m locations that will give a student discount if you provide them when any proof (like a student ID).
Last food for thought, some universities also offers financial aid packages in purchasing "technology". Sometimes, it's an added discount for at-need student in their computer store, a type of subsidy, and/or a very low-interest loan.
When my old laptop died, I replaced it with HP compaq laptop, bought from my university's computer store at a good discount, and payed by a computer loan from the university's credit union (you really can't beat a 5% loan, over 18 months, unless you decide to open a credit card at a place like BB, and have it interest free for that long...)
About Netbooks:
Since I already had a main gaming computer, I was already toying with the idea of using a Netbook, instead of a full blown laptop. I got the laptop instead, and I'll tell you why (keeping in mind, I bought my laptop about 8 months ago).
Netbooks are indeed crazy cheap, a decently equipped one will run around $300-450. They are really compact, light, and are perfect computers to put in your backpack and lug around from class to class. The problem with them comes from their nature, such as having really cramp keyboards (I have big stumpy fingers), small screen with hellishg resolution (I wear glasses as it is), and, at the time, you'll need to shell out extra for a higher capacity battery (My Asus EEE pc that I was looking at had a paltry 2hr battery life because Asus paired the machine with a smaller battery, keeping the weight and size down). My laptop costs around $1k, but it was a full fledged laptop with a 4hr battery life. It was comfortable to write with, had a pretty respectable 14inch screen, and most of all, It had an attached DVD-rw drive, and all netbooks don't even come with the option of having an optical drive at all.
So, If this will be your main computer, go for a laptop. But, if you already have a monster of a computer (or just another computer in general) and you're just looking for something to lug around from class to class, then just save yourself the money and look at buying a netbook. The new stuff coming out seems to have a bigger keyboard, screen, and batteries, making them a sound purchase. Hell, I see more of them around my campus now than 4 months ago.
For netbooks, look at the Dell Mini line, the HP Mini line, and ofcourse, the Asus EEE line.