WildVoice Studio is basically a recording application (it has some great features for Podcasters, but primarily it is a recording tool).
The hard part of making a good phone call recording is getting the recording of the phone to sound good. I found some good resource on the Internet where folks have discussed this problem. These links may be old, but I recall that the information was good.
You could also record the call using a free conference service like http://www.freeconferencepro.com/.