This might work. Grand Central has a beta program that allows you to record phone calls. I believe you can retrieve them through your email. Not quite like recording directly onto your laptop, but if you have internet access, you should be able to retrieve it. I am not sure that you can save the recording directly on your laptop.

Their system is that you can sign up and have one number that can ring through to two phones (more than two costs; two is free). Your messages come to your email. So far I like it. See http://www.grandcentral.com/ (there is probably a way to format this for a link; I'm sorry I don't know how)

It was written in the NYTimes last week and I think I saw a link here, but I'm not sure.