Just a quick update... The grocery stores on Rt. 20 in East Greenbush are open. I wasn't in Price Chopper, but Hanaford was well stocked. They didn't lose power, as far as I can tell, so they didn't need to jettison the perishables (I heard that the Hoosick St. Price Chopper in Troy did).
Also, Rt. 4 was open all the way from Rt. 20 beyond Rt. 43. (The light at Rt. 151 was out though.) All the gas stations have lines.