Apple probably could put "N" technology into the new iPhones but it's a case of whether it's worth it for them, since the N spec is a draft it could change, and they might want to wait until the iPhone necessitates the upgrade, since the "G" speed is probably enough for most of what average iPhone users do on their iPhones. All that being said though, with the focus of 3.0 seemingly being on video the upgrade to N speeds could be done at WWDC but obviously no one yet knows.