Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
Actually it's WAY less than $18/mo, I believe the highest is $12.95 if you go month-to-month, and as low as $8.31/mo if you pay at least a year ahead. And then there's lifetime options if you're into that. There's also a multi-TiVo discount that has a lower "max cost" but I don't recall how much that is.
I get the sense that the slow Comcast-rollout is probably in large part on Comcast.