If all goes according to plan, it will roll out free voice messaging and expand the service across Europe and later, China.

FORBES: Pinger's Polite Plans For World Domination

Its only product was a free voice- and text-messaging service for cellphone users.

FORBES: Magazine Article

You can't completely pigeonhole Skype when it serves both as a partial substitute for traditional phone service and an instant messaging service with voice and video on top.

ENGADGET: France investigates Skype after it doesn't register as a telecom provider (update: Skype response)