Flickr

Flickr appears to be taking the old electronic discussion forums (some may remember Usenet), and upgrading it with all the interactive and visual features. I find this resource to be like YouTube, but with photos. It's too bad there doesn't seem to be a hierarchy of topics as there are with the Google Groups or Yahoo Groups discussion lists. Nonetheless, this can be a very addictive resource that can compete with the existing image databases out there on the Web, especially since many people have digital cameras these days.