Just saw this on DSLR. I guess we knew this was coming. This is their way to boost their Uverse Voice service.

"Thank you for your interest in AT&T CallVantage® service. Currently we are not accepting new orders for AT&T CallVantage service. We will continue to evaluate our AT&T CallVantage service and remain committed to providing leading, next generation voice services for today's consumer and business customers. For information on other AT&T products and service please visit www.att.com"