Quantas are going to install it in one domestic 767 during early 2007, for a 3 month trial.
And yes, I would do my best to avoid it.
On one level it sounds really good for business travellers, as many are addicted to their blackberries, but most people I know who fly a lot on business really crave the ability NOT to be E-mailed or Phoned on the plane.
A bad idea. Let's see how the trials go..(excluding Ryanair)