According to TechCrunch, Skype for the iPhone will be released tomorrow.
Skype is a free application that allows users to talk to each other over the internet through connections called Voice over IP (VOIP). The iPhone app will also be free and allow any user of an iPhone to make 100% unlimited and free calls to other Skype users as long as they are connected to a wireless network.
Skype's application allow users to talk through VOIP no matter where they are in the world. The release of this application for the iPhone is HUGE becuase before you really had to be a geek to connect a mic to a computer and make a call from Starbucks, tomorrow - you'll just need to pick up your iPhone and call your cousin in Paraguay. Oh, by the way you can talk all you want, it'll be free.
T-Mobile launched Unlimited Hot Spot calling and I wrote about it inway back in October of 2006. The reason it never took off? You needed to be in a T-Mobile hot spot location. Bad move, T-Mobile, you could grabbed some serious marketshare there.