If you already use picasa for your chit then you're set.  If you don't then why not?  It's free and rocks!  I suppose this is only useful for anyone that uses their own site for pics instead of flickr or something.  Nothing but javascript and html in this thing.

http://galri.free.fr/ &lt;- I found the template there and made changes to it - mainly being able to navigate previous and next images by using the &lt;-  and  -&gt; keys on the keyboard.

http://videosean.gotgeeks.com/PETAchick/
http://videosean.gotgeeks.com/PETAchick/_Lightbox_VS.rar &lt;- can download mine there if you want.
http://videosean.gotgeeks.com/PETAchick/indexF.html
http://videosean.gotgeeks.com/PETAchick/_Lightbox_VS_Film.rar &lt;- added cheesey film borders so it each row looks like a strip of slide film - still flowing and independant of screen-res or browser window size.

I was gonna put this in the graphics forum but figured some ppl might be interested that don't look there.

As far as I can tell it all began here: http://www.huddletogether.com/projects/lightbox/
http://www.huddletogether.com/projects/lightbox2/