I know in the FAQ it says that there is no app yet, but you can play it from your iPhone or iPad. I decided to test it out. I have an iPhone 3GS (old phone) and a Samsung Galaxy Note.
I went to the sandbox to test it out. Here's how it went:
iPhone 3GS (running on iOS 4.0): page load fine, can see all the buttons, I zoom in to get a good view of the board. If i click on the buttons it does nothing. Can't change color or size. Also it wont draw, it only scrolls around. Export drawing button doesn't work. I never tested if you can describe drawings, but I can go back and check if anybody wants. So basically it's useless on my iPhone. Not sure if it's because of it's version of software is so old, or if it's like that for everyone. (please share your experiences)
Samsung Galaxy Note (on IceCreamSandwich): Page loads fine, I zoom in and make the drawing panel most my screen in landscape zone. I can click all the buttons to change size, color, undo, eraser. It draws, but with a little lag. Also it scrolls sometimes when you want to draw. To be honest, it's very annoying to draw on, even with the tablet pen that comes with the phone. I can draw the same with the trackpad of my mac with less effort sadly. Here's an example of what I drew on the Galaxy Note on Drawception's Sandbox : http://i.imgur.com/xoRfs.jpg (my drawings with my wacom are much better, but i'm still no artist, not even close)
Please share your experiences with your phones/tablets. Also include your OS that you're running on (if you know).
(I hope they come out with an app for both Android and iPhone when/if they do. I think a lot more people would play once it hit the Android/iPhone/iPad markets.)