Skype's popularity is spreading. The Luxembourg-based company will make its free software available to Apple's iPhone and iPod tomorrow. In May, Blackberry phones made by Research in Motion will also incorporate the software.
Until recently, Skype's service was limited to computers. With its push into the mobile phone arena, cell phones can now make calls and text other Skype users free. They also pay lower rates than traditional phone companies charge when they use Skype to call landlines or other mobile phones.
Earlier this year, phones running Google's Android and Microsoft's Windows Mobile operating systems, along with Nokia phones, added the Skype software.
Apple is limiting Skype's use on the iPhone to Wi-Fi networks. Cellular operators are opposed to Skype because it is far less profitable.