Recently I have seen one nice add-on for Firefox. Its one of the best application for viewing images or graphical search result.
we have created many gallary based site. some of them for hotel, some of them for tourism , some one want it to be personal. but showing images have different ways of liking.
RSS have made all things in standard application. and PicLens uses RSS (little bit different,minor changes). and Then your site will be ready to go live with piclens.
Though its not hard to implement for RSS based site. i am planning to use PicLens application for www.ahvideoz.com
In Piclens when you used it has feeling like we are moving in reallife gallary. something like which have seen in Room(Hall) where all images are mounted on wall. and we are walking in that Room. and only that images are highlighted. what a effect. I personally like that very much.