This sounds interesting. I am in Seattle and also hate Comcast with a passion. My roommate has a similar hate of Comcast. If I could get 200 mbit at a similar cost to what I am paying now it would be an instant transition.
Honestly, if the primary value proposition was "fuck your cable company, here's how to get internet without paying them" you could probably motivate some sales even if the price and service were the same.
I'm on the east side too. Seattle has many more providers than the east side. Where I am there is only Comcast and much slower dsl (20mb). DSL comes with a bandwidth cap. I have the standard comcast 1tb/month limit, but with an xbox, it's easy to use 100 gig just for a couple of giant games. I can see it wouldn't be too hard to use a terabyte.