Hi, and welcome to the game! I'm new to all of this too, but since I took the GRE less than a month ago, I can tell you what I know of the new GRE.
The verbal and quantitative sections are the same as before (out of 800 points each), but the analytical section has been replaced by an analytical writing section which is scored out of a total of 6 points. Therefore, the cumulative score is now 1600 and 6.
The analytical writing section is composed of two writing tasks, one in which you pick an issue to argue, and the second in which you critically analyze a given argument. Whereas the V and Q section raw scores are given immediately after you finish, if you are taking the computer-adaptive test (CAT), the written portion is manually graded and the score is announced in your official score report, along with your score percentiles.
The beauty of the CAT test is that you can register online for the test up to a day or so before the test date, if spaces are available. I for one made the belated decision to test, registered for the GRE four days before the test date, and crammed for three days straight. It was one of the most harrowing testing experiences I've undergone yet. But hey, I got into the school of my choice with that score, so it's possible!
I recommend you look at the official GRE site's test prep materials (
http://www.gre.org/pracmats.html#gentest). It's pretty thorough and gives a list of all the possible topics for the writing tasks, though there are hundreds. It just gives you an idea of what kinds of topics you'd be dealing with, and there are writing samples as well as lots of math/verbal help. Also, definitely practice the GRE on a computer before you take the test! The computer-based testing experience is truly different from paper!
Hope this was helpful! If there's anything else, give me a buzz!
