I have visited many websites and most of them show stills from the manga. Unfortunately, I have never read the manga, and so the pictures, while in the same style and showing the same characters, are not the poses and events I remember (having only seen the anime).
I assume that this is also your goal; to find pictures from the anime. Well, here they are, and I add more almost every day.
I wil be accepting fanart very soon, so if you'd like to see yours here, please email me: hieicool@yahoo.com
Thanks.
Just follow the links to the index of characters to choose from. The following site is ad-free, no pop-ups or anything (unlike angelfire). Be sure to take my poll (on the index page) so that I can find out which character is your favorite and the one I should concentrate on.
The Directory for Poltergeist Report