I got my new Linksys WRT54GP2A-AT wireless broadband router today and hooked it up. After getting the internet access working, I followed AT&T's instructions to activate my CallVantage telephone service.
AT&T CallVantage is a Voice over IP (VoIP) service that allows you to make telephone calls using any broadband internet connection, such as cable or DSL. There are a lot of really neat features, like listening to voicemail via a web browser, or having voicemail messages sent to you via email. The best part is the price. Unlimited local and long distance calling plus all the cool features (caller ID with name, call waiting, call forwarding, etc) for only $29.99/month. That's a lot cheaper than your local phone company and long distance service. Heck, I pay about $50/month total, and i don't even have call waiting or caller ID.
I've made a few phone calls already this evening, and it was pretty much the same as it has always been. I use my normal phone - the only real difference is that I have to use 10 digit dialing for all calls.
Our service officially switches over on the 30th, so if you call me after that, you'll be calling me over the internet!