Every year, I like to build a gift for the world. This year, it's the Infinite Canvas, an online collaborative art project of infinite scope. It came out of a discussion between me and Tim R, and only scrapes the surface of what's possible for such a medium. If you have Mozilla*, try it out:
You'll be dropped somewhere random on the Canvas where there's already some drawing. Use the tools at the top to move around and zoom in or out (you can do any of these indefinitely). Then select a color and start drawing! Click the save icon at the top at any time to commit your drawing to the Canvas for others to discover.
You can save a location on the Canvas with the value at the bottom of the page. Use this value by putting it back in the text box and clicking "Go!" (or just save the resulting URL).
Play around with it. Tell me what features you'd like to see, and I'll add them to my list!
* Currently, I don't support any browser other than Mozilla (I've only tested it on my copy, and I know it doesn't work in IE). If the "Status" never changes to "Done", it's probably broken for you. Tell me, so I can fix it-- and include what browser you're using. Thanks!