Roy Tanck, designer, geek, entrepreneur and WordPress enthusiast, creates a Flickr widget that lets your photostream fly. This is a very cool widget and yet it is very easy to set up. Roy creates a form online so you can generate a Flash Flickr/Picasa widget for your website or blog using your Flickr or Picasa RSS feed. Simply completing the online form will create the HTML code that you can copy-paste code into any HTML page, blog post or a WordPress text widget.
Here is the URL to access the form for creating a photo widget for Flickr or Picasa.
If you are looking to host the flash movie yourself and use images stored on your server, you may want to check out another widget created by Roy called Photo Widget.