It looks like Nokia is firing cannons against the Apple armada: their latest campaign—spotted in New York last Saturday—argues that their phones are better because they are not closed devices and they are open to any third-party development.
Nokia seems to believe that third-party software development for their Nseries is not only harmless, but could make their devices better. And even while Jobs pointed out that there may be third-party apps in the future, the fact is that right now this is not happening yet. Until then, we will have to agree with Nokia on this one. [MacRumors]