I'm sometimes slow so this may already be out there, but I just saw Google will start allowing calls through Gmail within the U.S. for free. (Skype like fees for international) Looks like it's more tailored to desktops but I wonder if they have any plans to offer via cell phones also??
Google unveils Internet phone service to compete with Skype - Aug. 25, 2010
Google unveils Internet phone service to compete with Skype - Aug. 25, 2010