[msh]

It says: There have been several inexpensive or free “turn your iPod Touch into a wifi phone” gimmick apps or services over the past few years, but they’ve always been a hassle (listen to a 30 second ad before your call begins..) or short-lived – so, I’ve just always dialed directly with my brick phone, and told my contacts “my real number is the google voice #, ignore the caller id”.

Which is not really true, skype have been providing real phone service for years.

[chaz]

The biggest difference is that you have to have a Skype In number, which is yet another phone number to give to people and for them to have to manage. Plus, it costs $5/mo. I like the one-time charge to port my number to Google Voice, and I'll simply answer the device that's closest to me at the time.