said by genxr:$30/month is what Vonage is charging for the same local-unlimited LD plan. It's certainly cheaper than the tradition Verizon/MCI/SBC is offering. $30 is competitive, but cheaper would be nice.
I wouldn't compare VOIP to POTS service, that's apples to oranges. Lingo offers the same thing for $20/month and I know the other players have been lowering their rates. I thought Vonage was cheaper too but I see its the same for the premium package, however I do see that Vonage offers different tiers at lower rates - not everyone need needs unlimited local/long-distance, maybe SE will considering offering different packages as well.