While my mac is having its motherboard replaced, after burning out just after the warranty ran out (Thanks Apple) and I'm having no luck installing Cs3 onto a temporary machine due to its crazy DRM which won't let me run the software I paid a fortune for (Thanks Adobe) I've been looking around at what online creative tools there are to see if anything can help my predicament. Aviary looks like a real technological marvel and I'll probably try that for a while.
But, the big news is Odosketch. I love it. In many ways there isn't much to it, but that's the point, it's the way it forces restrictions on you. There's no eraser, limited colours, and you can't change the size of the drawing tools. Just like real life. It's exactly like when you're sitting on the train and you have to doodle in the margin of a discarded newspaper with an old biro because that's all you have. And of course that's also when you can do your best doodling.
Here's a couple I did earlier:
Full size versions here and here