Skype may be ready to launch an iPhone version of its VoIP and IM client, a source told gigaOM. The "very reliable" tipster claimed that the iPhone launch could come as soon as next week, possibly at the CTIA Wireless trade show which kicks off on April 1st. Skype can already be used on the iPhone, but through third-party apps such as Truphone that combines a number of messaging and VoIP services.