Photo Sharing
Yahoo! Flicker
Flickr - almost certainly the best online photo management and sharing application in the world - has two main goals: 1. We want to help people make their content available to the people who matter to them and 2. We want to enable new ways of organizing photos and video.
YouTube: "How to Use Flickr" (2:04)
Picasa
Using Picasa and Picasa Web Albums together, you can now organize, edit, and upload your photos to the web from your computer in quick, simple steps. Arrange your photos into folders and albums and erase their blemishes using powerful editing tools in Picasa. Then use Picasa Web Albums to share those perfected photos online with family, friends, and the world.
PC full version download only. Mac version is not as robust and only works with web folders.
YouTube: "Introducing Picasa 3" (5:02)
http://www.coolutils.com/Online-Image-Converter.php