It is worth repeating here about what http://www.flickr.com/ says:
Flickr is almost certainly the best online photo management and sharing application in the world. Let us show you why!
Flickr is a way to get your photos to the people who matter to you. With Flickr you can:
- Show off your favorite photos to the world
- Blog the photos you take with a cameraphone
- Securely and privately show photos to your friends and family around the world
- ... and much, much more!
Basically, Flickr is what butters the borders between your photos to the people you want to see them. And basic accounts are free!