Do me a favor, and share some of your Yahoo! Photos albums on Yahoo 360.  There's now a working slideshow that automatically scrolls through the pictures that you've given permission to see. 

Now, here's some trivia for you - if you're using Windows IE, you'll notice that the photos fade in from one photograph to another, eerily similar to the slideshow on Yahoo! Photos.  That would be because before I was a web developer on Yahoo! 360, I was a web developer on Yahoo! Photos.  There were a couple of awkward days afterwards, but don't feel too bad for them - the new Yahoo! Photos web developer Scott is pretty damn talented.  Also, he made a version of the arcade game Arkanoid using only DHTML.  Could I do that?  Hell no.