Another great program that's more for photo organization but also has some basic editing options such as resizing, cropping, and some special effects is Picasa from Google.
http://www.picasa.com/
It will also interface with a program called Hello (also from Google). Hello is a cross between an Instant Messenger and an online photo album. You and your buddies can send pictures to each other quickly and easily by selecting them in Picasa, and then look at them together and talk to each other. It works so well that I can't imagine sharing photos with my friends without it.
http://www.hello.com/
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Fear not, for even though I come from the Forbidden City, I surely do not agree with the rules.
Chris Knight