What is a good website to make a slideshow thingy?

I see a lot of people on like myYearbook (and on Myspace back when I used it) who have their pictures in a little bitty slideshow thingy as their default. I've tried to Google a good website but my Google skills must be taking a break cause I can't find anything. If you know one where you can adjust the speed the pictures change, that would be nice too. :) Thanks. :D