105Mbps broadband plans back in May of last year, but the time since then has been filled with silence until this very moment, when the service has gone official. Neither the name nor basic concept have changed, however, with the Extreme 105 offering 105Mbps download speeds tied to 10Mbps uploads. Pricing has been tweaked a little, starting at $105 a month for the first year when taken up as part of a Triple Play bundle. Comcast claims coverage of 40 million people with its new rollout, including folks in Baltimore, Chicago, Denver, Miami, Philadelphia, Portland, San Francisco, Washington DC, and "the majority" of Boston. More markets will come "on a rolling basis." So what say you, are 105 megabits per second worth 105 dollars per month?