If you take pictures and share them with others on the web or by email, you need to know about Flickr.
Flickr is a photo-sharing site that lets you upload up to 20MB of photos per month free. If you want to do some heavy-duty sharing go to the Pro account for $25/year. This will also let you share photos without overstuffing the email accounts of your friends and family. You can even mark photos as accessible only to selected friends and family.
You can also browse the zillions of photos posted by others. I find this (a) entertaining and (b) educational. Entertaining because there are lots of daring people "putting themselves out there" for the sake of their photography: pictures that show them at their worst, or show their fears, or are rather sensual in nature. Pictures that take a bit of bravery to post. These portraits (and especially self-portraits) are my favorites.
Educational: because you can learn a LOT about taking good photographs by looking at the photos that others take and asking yourself why one picture works or dazzles while another falls flat. Things I've learned: watch your light sources, don't let everyone stare into the camera, get action shots, and MOVE CLOSER (fill the frame).
I've tossed a few pics up on Flickr here. You can also "tag" photos with descriptive notes. Flickr will then let you search on the tags to find pictures of interest to you. For example, pictures of flowers (most recent first or most interesting first) are found with a search on the "flowers" tag. The tags end up being pretty intelligent as well by "clustering" tags into groups.
Fun site. Educational site. Useful site. Free site. Works for me!!!