Slideshows
Flickr have just launched a new and improved version of their slideshows. They are now much bigger, and have lots of lovely features like transparent notes, adjustable speed, and the URLs are much nicer.
Have a look at some nice photos of Stonehenge: http://www.flickr.com/photos/tags/stonehenge/show/
Video
As read on TechCrunch, Flickr might soon be adding video, as well as Yahoo! closing! down! Yahoo! Photos!
The official thread over at Flickr makes interesting reading.