A good friend of mine and fellow photographer introduced me to flickr a couple years ago, and it's incredibly useful. For a very low price I have unlimited photo storage, the ability to download original sizes of my photos for any reason, and access to the photography network on the website. Because it's designed for high quality photo viewing, and I can change the privacy settings on any photo I upload, it's a great place to direct clients to when they want to see my work.
Here is my flickr page. Don't forget to visit frequently for updates.
