I know, I know....firefox is the answer to all of lifes questions. But if you use IE, this is a very cool add on I found.
PicLens | Immersive Slideshows Across the Web
If you go to sites with alot of pictures on them ie: photobucket, google image search, etc you can take all of the photos on the page and instantly make a slideshow gallery with them.
Its fun to mess around with. Anyone else have any cool IE addons they use?
Edit: Looks like it works for Firefox as well. =)
PicLens | Immersive Slideshows Across the Web