The Information Architecture group started by EmWi on Flickr never took off, but snowcrash has started the IA Discuss group to share screenshots of UI widgets, deliverables and such. It's an idea similar to Christina's Widgetopia, but on Flickr. Jess wanted to something like this a few years ago on this site, but we never go to it. Flickr seems the easiest place to do it. Not sure why no one has bothered to make use of the Information Architecture Flickr group like this before.