This post is about embedding the old flickr slideshow into a web site. There are a few web sites explaining this.
Generators
http://flickrslidr.com/index.php
http://fabiocavassini.com.ar/SlideShowGenerator.html
http://www.lazyi.net/projects/flickr-slideshow-html/
Pictobrowser: a generator for a non flickr slideshow: http://www.db798.com/pictobrowser/builder.php
Flickr api discussion
http://www.flickr.com/groups/api/discuss/72157612657089214/
About parameters
http://paulstamatiou.com/how-to-quickie-embedded-flickr-slideshows
http://snipplr.com/view/1457/placing-a-flickr-slideshow/
Also, embedded badges
http://www.flickr.com/badge.gne
http://www.elliotswan.com/2006/08/06/custom-flickr-badge-api-documentation/
Or even direct api use
http://www.viget.com/inspire/using-the-flickr-api
This post is also available in: French