Flickr

I already had a flickr account so this made me get on and use it. I have sent three photographs to the "23" flickr group.

It is a very good tool for social purposes and if you are happy with your photos being used by others (and put in other people's online galleries). If you chose to have the license with acknowledgements, I discovered it uses your flickr ID - so not your full name. This is not ideal if you want to be properly credited and if you are taking your photography seriously.

The best protection is to make the photos low resolution or to watermark your photos on your own web site.

A member of the Web 2.0 mentioned this site

http://photobucket.com/about. I have yet to look into this though.