If you find anything you like, you just click on it and it will take you to the source page on TwitPic where all the comments, view count, and original Tweet are stored.
TwitPic has its own recent uploads section made up of thumbnails, along with a moving map of recent photos, however I found Pingwire's simplistic stream more fun to let run in the background.
There are a few things to look out for though. For one you can't pause the stream, so if you want to click on any thumbnail to see more detail you have to be quick with your mouse. There's also no filter for adultish content, so you may see things pop up that you wouldn't want to see at work. Or ever.
(found on Boing Boing)