Hey everybody,
I have been working on a new web-app for a while now. Today I released it:
webchemy
You draw in the browser, but the crazy thing: works like a charm on iPad and iPhones. (Android not quite so perfectly)

A bit of additional info: It's based on the desktop application Alchemy. So kudos to those guys. :)
Also, Webchemy is open source.

Let me know what you think!
Happy Holidays

It's cool.. do I control the shapes in the pull-shape option? I didn't get how that tool works..

It randomly chooses from a set of shapes and draws them at the cursor position.
That way you can really quickly get an initial idea going with a few strokes. Later on you might only want to use it sparsely because the composition can get pretty crowded otherwise.
Depending on much you're zoomed in/out it changes the the scale of the shapes.

That's fun :)

Yes, it is :)

Lots of fun :)