Jemaine Clement and Bret McKenzie, aka the folk-parody band Flight of the Conchords, hail from New Zealand and were named best alternative-comedy act at the 2005 U.S. Comedy Arts Festival. Now they're starring in an HBO series called, yes, Flight of the Conchords — which is, yes, about two transplanted New Zealanders living in New York City's Lower East side. It launches Sunday.