I only want to use a pen on OS X for drawing (actuall "free form" drawing). Until that happens, I would need to buy a $700 paper block called iPad and that's not in my intention.
> I only want to use a pen on OS X for drawing (actuall "free form" drawing). Until that happens,
This has only been possible since the release of Mac OS X Public Beta, "Kodiak" in September of 2000. Hundreds of freehand drawing applications have been developed since, and nearly all the hardware available since has always been supported by the OS without a third-party driver being necessary. Wacom comes to mind as a input device developer of drawing tablets and pens that has been around on Macs long before Mac OS X was first released.
For one that one app. The OS supports them otherwise along with probably hundreds of other applications, as it has always been. But let's assume Freeform did support Wacom tablets; literally no one would buy a Mac for the sole purpose of using Freeform on a third party drawing surface. But people are crazy, and unreasonably so. Because unlike the GP, people will buy an iPad just to draw in Freeform. Annoying yet clever of Apple, if they want to sell iPads.