I finally have Internet at home (geekery)
by at 7:54 PM
I have to say, Comcast is pretty great at getting things going when they need the going getting.
My cable modem arrived today ($60 from Amazon) and I hooked it up. It was able to train up but couldn't get any routing, so I called Comcast, and the tech (who treated me respectfully and didn't talk down to me etc.) found that when I placed the order, the sales person entered it as a self-install with a leased modem, which is certainly not what I ordered, nor what the sales person had confirmed to me. But he got it straightened out, and after I gave him my MAC address, I was online right away. Awesome.
Also:

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Basically I went with Comcast because they're cheaper than DSL around here (even with the cost of cable), and I wanted better TV reception anyway. The fact that now I can finally watch episodes of Stargate which aren't just last season's reruns ad infinitum is a bonus.