I was happily surprised how easy it was to get my Wacom USB-Tablet to work with the JTablet plugin by Cellosoft: http://www.cellosoft.com/sketchstudio/

Here's how it works:

- Download the plugin installer and the SDK from the download page- as of writing it's version 0.9.4:
http://www.cellosoft.com/sketchstudio/

- run the setup JTabletSetupv0.9.4.exe

- to test if the installation has worked, make sure that you close any open instance of your browser before opening
JTablet-test.html or JTablet-test2.html from the jtablet-sdk-v0.9.4/examples folder - if it works you can proceed to make use of it in Processing:

(edit)
Sorry, but the following part doesn't seem to work yet, looks like I tricked myself:
(/edit)
- create a new folder named "jtablet" or "cello" inside your processing-0085/libraries folder anb copy the file jtablet.jar into it. You'll find that in the jtablet-sdk-v0.9.4/dist folder.

(edit)
Currently you still have to do it the old-school way:
(/edit)
- add a folder name "code" to your sketch's folder and copy the jtablet.jar into it - that's how it will work.


- start processing, create a new sketch and paste the following example code:

Code:

import cello.tablet.*;

JTabletCursor cursor;
JTablet tablet;

void setup(){
try {
    tablet = new JTablet();
  } catch (JTabletException jte) {
    System.err.println("Could not load JTablet! (" + jte.toString() + ").");
  }
}

void draw(){
 try {
    tablet.poll();
  } catch (JTabletException jte) {
    System.err.println("Could not poll JTablet! (" + jte.toString() + ").");
  }

 if (tablet.hasCursor()) {
      JTabletCursor cursor = tablet.getCursor();
     println(cursor.getData(JTabletCursor.DATA_X)+"/"+cursor.getData(JTabletCursor.DATA_Y)+"/"+cursor.getData(JTabletCursor.DATA_PRESSURE ));
  }
}
 

That's all for a simple start. For all the additional functions like getting tilt, orientation, pitch, roll (whatever your tablet supports) check the API docs in docs\index.html

Thanks for the corrections Marcello.

Maybe you also have a hint how to get the coordinates correct in processing - I have the problem that they do not seem to be the same as mouseX/mouseY - actually Y is upside-down. Currently as a workaround I'm only using the pressure information and take the x/y from mouseX/mouseY.

Has there been any movement on using tablets on the MAC I could really do with reading the pen's pressure.

Seems to be a bit of an issue.

The only thing I've come across is something called jwacom, but it's only for Linux.

Tablet currently sits on floor looking very redundant for something less than 5 hours old! Bugger! I only want the tablet for processing, no other use for it.

appreciate it Marcello.

Sorry, but I wanted to revitalize this in the vain hope that someone has any ideas on OSX pen pressure!

Well...?