when i moved last year, my apartment was supposedly already wired for comcast internet, but we had trouble staying online. then they gave us shit for trying to put the bill in a new name without charging us a 'new customer' outrageous installation fee. eventually we gave up and went thru RCN who said that our main cable line had been mutilated by squirrels and ran a whole new line up to our floor for no charge.
we don't have cable tv but our internet hardly ever drops out :)