My test call from the Skype's website did not work, so I ended up calling DH on our landline to see if it worked. Yep. It was sort of fun hearing his voice on our computer speakers.
I can see use for this in my personal life. All of my family lives in the midwest, so we do rely on phone communication. All of my siblings are older, and I know that they really aren't concerned about their cell phone minutes when we talk. But, this might be a way to have some of those marathon conversations. I'm curious of how this works with an incoming call. I'll have to have my sisters set up a Skype account to test it out.
I honestly can't see a use for this in the classroom...therefore...I don't have any concerns.