Shameless plug: I wrote something really similar using Meteor, so the drawings are realtime and you're not limited to the iPhone (but works on it too). I was th

Shameless plug: I wrote something really similar using Meteor, so the drawings are realtime and you're not limited to the iPhone (but works on it too). I was thinking of adding chat functionality too... Since it works on the desktop, it actually has legit uses like sending previews of works in progress with annotations. Would love to get more feedback though: http://my.sket.sh/ http://my.sket.sh/