Groupboard allows you to use your iPad as a drawing tablet, and see the results on any platform, since the medium for sharing is the web. There might be other apps out there that do this, though I am not aware of one. I know there are apps that allow you to share whiteboards with other iPad users, and web-based whiteboard collaboration apps, but this one is unique in that the iPad side of it is an iPad app. And it seems to work pretty well. A few problems: The control buttons are at the bottom of the screen, where it is easy to accidentally select them via your palm as you are drawing on the tablet using a stylus. Also the color controls seem fluky when switching colors, and Groupboard crashed at one point every time I tried to change the line/font size, though it isn't doing this now. More whiteboard options would be nice, like a Clear button -- there is a shake-to-clear option but no button to click to clear. The basic concept is Pretty Neat though, and Groupboard delivers there. Great price too.