Just a suggestion about keyboard shortcuts. Would it be possible to have (at least for the Windows version - since Macs don't have that) ALT+ shortcuts for top menus? Such as ALT+F would open the file menu, etc. And also for some menu items, to have the standard windows underlined shortcut keys (such as when, say, L is underlined, pressing L would execute the command), besides the usual CTRL commands. This way, virtually all menu commands could be programmed into the WACOM pen's menu and you could select them via the pen's button.
Another thing. Now that AR became my favorite painting program (sure, photoshop and painter is here, too, but AR have it's own wonderful personality) would it be possible to "standardize" certain keys that are used in painting packages - at least in the major ones? For example, both photoshop and painter uses the [ key to decrease and the ] key to increase the brush size. AR uses SHIFT+Left/Right arrow, which does make sense, but people (like myself) who done lots of PS and Painter work got used to the  keys.
Currently the painting tools are assigned to the keys 1-0 plus 2 extra. As I was reading the threads for various suggestions, and requests for more tools, it will become apparent that the keys for selecting tools will soon (or in the future) will run out :-)
So why not use - again - the same ol' PS/Painter trick to use the 1-0 keys to set the pressure sensitivity. Pressing 3 would set the value to 30. Pressing 3 and 5 fast (equivalent to 35) would set it to 35, etc. Then "donate" the arrow keys to the actual selection of the tools in the tool bin. I know the toolbin might change to accomodate more tools, but in the current layout the left/right arrow keys could select tools in "rows" - that is, it would select tools from the same "circle" - and the up/down arrows would select tools in "columns" - that is, it would move the selecting one "circle" up or down in the toolbin.
Anyway. Just some thoughts. Keep up the great and wonderful work you guys do! AR Rocks!
PS: Don't you hate when you work so hard and then people give you their own ideas about how things should work/function... and how you should change it...? :-)