I'm looking for web-sites that can serve as a supplement for my
weekend studying. that is, a few sites i can spend my time on during
my down time at work to help study. I'm not looking so much for sites
on explaining how to take the GRE as much as some that are subject
specific, like vocab, quant, etc.

Hello,

There area number of websites with free GRE practice materials,
including subject specific:

GRE Download Library 
http://www.gre.org/pracmats.html
verbal prep, quantitative, writing, essays, strategies, software
full-length practice books: Biochemistry, Cell and Molecular Biology,
Biology, Chemistry, Computer Science, Literature in English,
Mathematics, Physics, Psychology
(the offical GRE site, almost all resources here are free to anyone -
I downloaded them to make sure - ALL resources are available free once
you have registered for the GRE test itself)

Free GRE Prep from Number2.com
http://www.number2.com/exams/gre/index.cfm?s=0
online interactive tutorial
(developed by ex-Harvard profs, requires "enrollment" but is free)

Free GRE Online Demo - The Princeton Review
Includes:
A full-length computer-adaptive practice test 
An interactive lesson introducing you to the GRE 
http://www.princetonreview.com/grad/testprep/testprep.asp?TPRPAGE=80&TYPE=GRE

GRE Test Information :: TestMagic
http://www.testmagic.com/gre/
Study GRE on-line: GRE Analogies, GRE Sentence Completions, GRE/GMAT
Critical Reasoning, GRE Vocab, Sample GRE Essays, GRE study plan

GRE Online Course
Free Practice Tests
http://www.testprepreview.com/gre_practice.htm
Self-Assessment Modules & Improvement Resources in Vocabulary,
Reading, Writing, Essays, Math

GRE Vocabulary Builder
http://www.soundkeepers.com/GRE/

Free GRE Preparation Material
http://www.vyomworld.com/gre/index.asp
Word List, Antonyms Test

GRE Wordlist
http://grewordlist.groupfetch.com/
freeware program for vocabulary review including a customizable and
sortable wordlist

GRE Vocabulary Builder
http://www.geocities.com/cool_techie2000/index.htm 
freeware program with a customizable wordlist

GRE Vocabulary Sound Files
http://studyforgre.faithweb.com/ 
Offers a large vocabulary list in a sound file in mp3 format

I hope these are useful. Let me know if I can be of further
assistance, and good luck! jdb-ga

exactly what i was looking for, thanks!

Thinkbowl --

Many libraries collect the various GRE/Educational Testing Service
guides and keep them year-after-year.  That might be a good stop for
you.

Good luck!

Omnivorous-GA

Books i have, but while at work i'd like to be able to visit links
sites that provide additional help, perhaps for free.