There are MUCH cheaper alternatives to Comcast and AT&T phone service.
I went with Ooma. The service is free... You just pay the one-time price of the hardware, and local taxes and fees (which amount to about $4 a month). So far, the call quality is just as good as Comcast's ever was. Hell, even Vonage is cheaper than AT&T.
When I dropped Comcast cable and phone (I still have their internet, because it's either that or AT&T U-Verse and I refuse to deal with AT&T), this was the setup I went with:
1) Clearstream2 Antenna from Antennas Direct mounted on my roof to pick up over-the-air channels (there are about 15 of them in my area). - $40
2) Two Roku boxes for streaming Netflix and Hulu to my two main TVs - $49.99 for the LT model and $69.99 for the XD model
3) Subscription to Netflix - $7.99/month
4) Subscription to Hulu Plus - $7.99/month
5) Ooma VoIP telephone system - $95 for hardware (refurbished unit), $39.99 to port my existing phone number away from Comcast + $4/month
I used the existing cable lines that Comcast had been using to run my antenna to my TVs, and my Ooma Telo unit just plugs into my modem and then into the wall and connects all of my phones.
Total cost: $294.97 in one-time hardware and set-up costs, and about $20/month in subscription fees.
To put that in perspective, I was paying $168/month for the triple play bundle on Comcast. Now I'm paying $58 a month for just the internet, plus the $20 a month for my new subscription services. I cut my monthly bill by more than half.