Warning: LONG.

hehe :howdy
Long-term viability: As has been said before, get the fastest thing you can afford, and as much memory as you can afford. I'd get 2 gigs right away if you want it to last. It's a bit of overkill now, but it won't be in a year or two. And most laptops don't have extra DIMM slots to just add later, you'll have to swap out if you want to upgrade.
Battery life: Get a processor package that's optimized for battery life, and get the big battery right off the bat. Intel has Centrino (actually I think there's a new name for the new generation... Core or somesuch), AMD has Turion. Lots of performance-oriented laptops use desktop processors in them, which suck up the juice like crazy. The Alienware I looked at had about a 45 minute battery life, at best. My Dell with the Centrino will do 2 solid hours of Doom 3.

And quite a bit more if I'm just browsing or doing non-graphic-intensive stuff. Also get the biggest battery offered for whichever laptop you decide on. Dell, for instance, has a 6-cell and a 9-cell battery. Bite the bullet and pay whatever the upgrade charge is. You'll thank yourself later.

General tip: Keep your screen brightness at the minimum you need to see what you're doing. If you're browsing/word processing and most of what you're looking at is black text on a white background, it's easy to see, and you can reduce the brightness significantly. This will save HUGE amounts of power. I can easily get an additional 30-45 minutes out of mine by reducing brightness to around half.
Wireless: If you go with a Dell, get one of the upgraded Intel cards. The Intel wireless client (software) is much more robust than the Windows client. You'll get far more information about what's going on with your wireless, why you may not be connected, etc. Also, I've found that mine is a very strong card, compared to most. I've been able to get weak, but still useable, signals in places where nobody else can seem to pick up a thing. Had a long break in Springfield, MO the other day, and I could get the wireless from the airport terminal sitting a few rows back in the plane at the gate.
Pricing: Since you are going to be a college student, you are eligible for Dell's EPP program.
www.dell.com/eppbuy Click the drop-down list and select 'higher education students/faculty/staff'. You get an additional 6% or 12% discount (depending on length of warranty you choose) on top of whatever promotions they may currently be running. Create an account, so that Dell has your email address, and you'll also start getting coupons periodically with huge discounts. When I bought mine, I had a coupon from email for 33% off, plus they were running some free upgrade special (don't remember exactly what), plus they had a $200 mail-in-rebate on the 4-year warranty plan, PLUS I got my 12% epp discount on top of all that. All in all, I got the same exact laptop that I had priced out the day before on the consumer side of Dell's website at just over $2400 with only a 2-year warranty, for $1900 with the full 4-year plan including accidental damage coverage. If you don't need it right-this-minute, and you can just sit back and get the emails through the summer, then just see when they send out 'the big one' and jump on it.

For Memorial Day, they sent out a 25% coupon. The one I used when I bought mine was 33%, and a couple months ago, I gave a 35% coupon code to a friend for his purchase. You also have to factor in whatever promotions they are running in addition to the coupon. Using a 25% coupon when they are running free dvd burner and free memory upgrade promotions may be better than the 33% coupon when no other promotions are going on. So like I said, if you've got some time, just create an account, get the emails, and lie in wait until the best deal comes along.
Just found this... good way to create an account, and you might win something

hehe
http://dell.eprize.net/atgwin/
Since I know you're looking, I'll PM you any future coupon codes that I get, in case you don't get the same ones.
