The Long Reach of the LongPen

At our recent bloggers meeting we discussed, among other things, Margaret Atwood's LongPen. Over at Bookninja, they point out that Norman Mailer has pleaded the "Three A's" - age, asthma, & arthritis - and is going to use the LongPen to sign at Edinburgh's literary festival. I'd like to hear the results; are people going to use it? Are they going to find it satisfying?
An alternate use for the LongPen has been suggested, one which I find most appealing. Imagine the possibilities...