DashCast allows you to view iPhoto Photocasts and Flickr Photostreams from inside your Dashboard. You can select from the list of pictures available on the pop-out tray. You can even set the option to keep viewing your favorite picture in the Photocast, even when the Photocast is updated.
Updates even when your Dashboard is left open!
What's new in DashCast
Compatibility with photostreams from Flickr.com.
Clicking on a picture now opens it in your favorite Web browser!
Photos update with the newest picture at the top of the list, no more scrolling down to the new pictures.