I must be slipping. I came across Lingo while Googling and I've never heard of them. They offer broadband VoIP just like Vonage. In fact, their rate plans and prices are eerily similar to Vonage. For instane, Lingo has Basic - 500 minutes for $14.95, Unlimited for $19.95. They also offer an interesting plan called "Unlimited International" for $79.95.
It won't be long now before two guys in a garage will be launching their own VoIP phone companies... Come to think of it, maybe I should?
Check out Lingo here:
Broadband Phone Service - Do you Lingo?