Inklet 1.3.1 is now available for download, new today. Not much in the way of Help files or support. There isn't even a post on the developer's blog.
I couldn't get 1.3.1 it to work with my Magic Trackpad, couldn't figure it out, and by accident hit my Pogo on my Magic Mouse- I was drawing... with a Pogo, on my Magic Mouse.
So I disconnected the Magic Mouse, and viola! Drawing with the Magic Trackpad!
I'm not getting pressure sensitivity, but I can draw with almost no pressure on the Magic Trackpad.
*To get Inklet to work with Magic Trackpad on a MacBook or MacBook Pro, you have to select 'Prioritize External Trackpads' in the 'General' Inklet preferences. This also disables the MacBook trackpad in Inklet. I had to use the keyboard sequence to activate Inklet/set workspace with the Magic Trackpad, as opposed to normally using the MacBook 'tap top left corner to activate Inklet workspace'. No response at all tapping the (any) corner of the Magic Trackpad.
Still have to do some goofing around, but it is nice to hold the trackpad in my hand, the way you would hold a small sketchbook, without the bulk and wires of a Wacom tablet.
Inklet also has a preference for 'finger', so you don't need a Pogo/stylus.