Cool idea.
Instead of having "Page x" and then on the next page "Page y" have at the bottom "Page 1 | 2 | 3" so that you can choose to go to the last ones, this would be especially helpful if you added more.
Consider hosting your images somewhere like Imageshack (http://www.imageshack.us) which offers unlimited image hosting (up to 1mb per file) for free, this way your bandwidth would be kept smaller by people not linking of you.
The text at the top seems to keep going bast the background grid effect so maybe increasing the size of that to make it fit.
Although a black background can look good it is accepted that where people spend a long time looking at a page it tires the eyes quicker than a light background (say white) so consider changing that.
Consider having the images appear in a new window (_blank) or even in a custom pop-up window ( http://www.whytehouse.com/custom-popup-win.asp ) so that you can keep the original page.
Also you could make a "forum image" so that people can link back to you (88x31) is the standard size (an example here: http://fml.m-hosting.biz/buttons/fml.gif ) which means people can put that in their sig and recommend other people).

Good luck with your new site

*Nanook
http://www.bains007.co.uk