An Alternative Theory...
So how's this for a theory. Apple courts Cisco, leading them to believe that Apple legal's decision to sign a licensing arrangement for the term "iPhone" is imminent. On the day of the hypothetical signing of this agreement, incidentally the day that the actual device is introduced, the day that Apple wants the most possible exposure, Apple declines the agreement, hence forcing Cisco's hand. Cisco sues, taking Apple's bait.
Why bait, you ask? Apple counters, after it is introduced, that Cisco's suit is "silly." After all, the term "iPhone" has been in the public lexicon for a number of years--Cisco's claim has no merit. And here's where it gets interesting. Why would Apple offer a defense that would admit "iPhone" into the public lexicon, and thereby, offer other vendors the ability to brand their product as an "iPhone?" The answer. Because that's exactly what Apple wants.
Think about the Keynote. Three Things. First, Steve introduces the new product as a "new class of device," presumably a class for which no nomenclature exists. Second, Steve makes a point of dissing the entire Smartphone crowd by contrasting it with the new "iPhone." Three, Steve makes a point of delineating the "wall" of patents that have accompanied the invention of this device and that no one would be able to touch it for five years.
So, Apple essentially invites its competitors to a competition where it will have the advantage for five years. Not only invites them, but tempts them, through the Cisco suit, to follow Apple's lead and name this new generation of devices, generically, "iPhones" the way that "iPods" have become generic terms (and dictionary admitted terms) in the public vocabulary. And these competitors, ever unaware of Steve's wile, take the bait, name their products "iPhone," in a space they can't possibly compete realistically in for three years, maybe even Steve's hyperbolic five.
A marketing strategy out of a suit to create a vocabulary for a new class of device where Apple can't lose and the stakes with Cisco are, given the market, incidental (and only if Cisco's claims are upheld, which is far from clear). Not bad for your everyday conspiracy, huh? And everyone now knows what an "iPhone" is and who makes the best one. Not bad for a week's work!