Skype, the popular voice-over-Internet phone service, is about to land on the iPhone today. Skype, a unit of eBay, is set to announce the availability of its service on the iPhone platform at a press conference at the CTIA Wireless show in Las Vegas. Users of the iPhone and the iPod Touch will be able to download the Skype app through Apple's iTunes store. Calls to other Skype users will be free, while calls to landlines and mobile phones can be made through Skype's SkypeOut paid service. All calls will need to be made over Wi-Fi and not over AT&T's cellular network. The rollout trails other voice-over-Internet apps on the iPhone including Fring and Nimbuzz. Skype has been on other platforms such as Windows Mobile and Symbian and most recently on Android. But now, it's finally getting to some of the most popular platforms in the United States. In addition to the iPhone, Skype is expected to make it to BlackBerrys in May. The iPhone version won't have everyt...