“Hey, Comcast Team!” yells my 19-year old stepson, Kip, pointing to a billboard in downtown Boston. His red City-Year sweatshirt sports a Comcast logo. As he passes the billboard, he grins from ear to ear. Way to go, Comcast. (Other City-Year sponsor firms include Microsoft, KPMG, Deloitte and Touche, T-Mobile and Timberland.)