Ok, so this post ended up becoming a lot longer and more rambling than I was hoping for. I sort of turned it more into a general advice post in regards to laptops, computers, and gaming in college, specifically for someone going into the dorms, although there is stuff in there that addresses the OP. Just a forewarning.
I remember when I was shopping around for laptops when I started college (about 2 years ago) there was a pretty damned good deal on a compaq lappy for somewhere around 500 bucks. I know 2 of my friends ended up getting that model and they seemed fairly content with them. Try the HP website, I think that's where they found theirs. I know your budget is totally tight, but if you could at all be able to bump yourself up into the 800-900 dollar range, your options would be much more open, especially given the kind of specs you are looking for. I got my Dell Laptop (the one I am typing this message on right now) for about 850, I think, and I got a printer with it for another 50 bucks. Generally the laptops I saw were the 8-900 dollar Dells and HPs (mostly Dells), and then a lot of Macbooks (about 900-1000 somewhere in there), and A LOT more Macbook pros (Somewhere around 1200 I think). As for netbooks, I saw a few of those around, and they seemed to work very well for what you're going to be doing a lot of in college; namely facebooking, watching movies on netflix, and taking notes/writing essays. Definitely worth their keep if that's all you want to be doing on them.
As for gaming in college, unless you're a really hardcore gamer, I'd recommend against bringing up some kind of a super rig with a bunch of games, at least if you're going into the dorms. I did it for my first year, and while it's fun, it's way to easy to get isolated doing it. When you get to college you're going to be so busy going out on Friday nights and partying/wandering around/having fun, video games, at least I find, tend to fall by the wayside. For videogaming in college, in my opinion, you're much better off bringing a console with good party applicability, the best of the best is a N64, with the next best being a 360 or a Wii if you have one of these BRING IT, you'll find you'll get much more use out of it than a big gaming rig with a bunch of steam games on it. As for computer games, I'd recommend bringing low intensity games. Not necessarily simple ones, but more like oldies but goodies that are easy to install, don't put too much work on the processor and are easy to fire up if your professor is getting boring/you need to kill 30 minutes. Games I used were things like Rollercoaster Tycoon, AOE2, M1TW, Zeus, and those types of games. That's just my experience with gaming in college, and you're free to do whatever you want, that's just my advice.
Desktops at college: I'd recommend against it. I did it for my first year, I brought my homemade desktop up and it was pretty fun; being able to play all those games on there was nice, but I think I had a much more enjoyable year my second year when the desktop broke down and I was forced to be much less of a recluse, and enjoyed the college social life. Plus lugging that desktop back and forth is a pain in the ass and wastes valuable space when you're trying to cram all of your stuff for the year in one minivan.
Also, as said above, if this is going to be a laptop for schoolwork, you may want to keep in mind that buying a printer and some sort of office program would be a VERY good (albeit not necessarily mandatory) idea.
As for utility of laptops in college, I don't think I'd be able to live without mine (in fact I found it very difficult living without it for 2 days when I left it at home one time). Not only does it make notetaking and keeping track of your notes themselves very simple and painless (especially when you learn to type quickly and correctly), but it's also very useful for life in the dorms, from a social aspect (arranging parties, meetups for things, and trips downtown are much easier, facebook in college social life is sort of starting to become a bit mandatory), and then, although this sounds terrible to say, there's the status symbol aspect of it. Now, this may be a bit different for the OP, being that he's going to community college and he'll be living at home (I know a lot of the above deals with dorm life), but it's still applicable and I think helpful to any other prospective college students going into dorm life and junk. Well, that's just my 2 cents.