Bruce Sewell, General Counsel and senior vice president for Apple stated: "Other companies must compete with us by inventing their own technologies, not just by stealing ours."
We'll post any more details on these lawsuits as this develops, so stay posted.
Update #1: Engadget's Nilay Patel has, of course, pointed out some interesting things. Notably: while this is about patent infringement, the majority of claims are around some insane licensing terms Nokia felt it was entitled to. Read his post for the breakdown and a PDF of the paperwork.