Just got Vonage hooked up and it is absolutely amazing. As my old Professor Powers says: technology's great when it works! (Of course, he always says this in jest when something goes wrong as a result of technology).
Anyway, in case you've been curious about the service, I'm another fan. And if you've been thinking about making the switch to VOIP, let me know and I will shoot you a referral coupon so you can get a FREE month.