Ahhh, I just noticed your question. Sorry if my reply was late…
The best source for online jgvideos is http://paradoxfive.com
You’ll need to registrate an account but it’s actually worth it because they post new videos pretty much weekly.
And I know that it’s not online jgv, but I have a blogspot where you can download a few full movies: http://gvcafe.blogspot.com
(Haven’t uploaded anything new in a few months tho. I wonder if I should be more active…)