
I took my Modbook to a costumed gesture drawing class at work for the first time and it performed beautifully. I also tried tilting the tablet upright and sketching in "Portrait" mode and discovered some quirks along the way.
While upright and drawing using Sketchbook Pro I found that the digitizer behaved erratically and the pen would lose it's alignment in certain spots of the screen. But for the most part it behaved well enough to sketch.
For more details regarding the Modbook's debut in drawing class and complete collage of poses, click HERE for my companion post on Random Anomalies.
***CLARIFICATION***
When I mentioned that I worked in Portrait mode, I should clarify that this meant physically tilting the Modbook upright and sketching while the tablet is set at the default "Landscape" mode. Right now Mac OS 10.4 does not provide for tilting the screen upright, but it certainly does not stop any user from drawing or noting with the screen tilted upright. (You can simply rotate the resulting graphic in Photoshop afterwards)