(warning : slightly soapboxish, sorry :-P)Creative Commons
offers an easy way to choose a personalized license for your work (You can get little pieces of html to stick on your page).
It makes it easier for people to reuse your art (on websites, or in video games) without having to bug you about it. And it makes it easier for you to chose who can do what with which picture.
What would you think about being releasing some of your work here under a Creative Commons license ? (I'm interested in any feedback)