Nokia has always been fairly quick on the IP lawsuit trigger, I think. They sued one of my earlier companies (biofeedback and health monitoring in phones/PDAs, etc.) after we demonstrated the devices at a very small (<50 people, including startup teams) conference. They have ridiculously broad patents in the mobile area. And they have very ambitious plans.
Of course, they still have no device on the market that does what our devices could do, and probably never will. I hope Bilski changes some of the patent BS for the better.
It's going to be interesting to watch how Nokia squares up their Pro-Open Source message (see: maemo) with their IP enforcement strategies.
Nokia have of course every right to enforce their IP, but PR wise they look very lame for this move. The timing (just as Apple announces a record quarter) and the fact they clearly have failed to make a competitive product to the iPhone, just makes them look desperate.
Of course, they still have no device on the market that does what our devices could do, and probably never will. I hope Bilski changes some of the patent BS for the better.