How can I embed a slideshow into my blog or webpage?

I believe most of us have many pictures which we would like to share with others. However if we were to show each picture individually, it will take a long time for our site to load. Creating a slideshow will reduce the waiting period and you can even add in some cool features.I have explored two imaging hosting sites - Picasa and Photobucket. One is back by Google and the other by MySpace.