WPA at Joe’s Pub (08/19/08) Photos: Jon Klemm Fittingly for a collective named after a New Deal agency, the group distributes its singing and songwriting duties. Mr. Bulla, whose regular post is with Lyle Lovett, arrestingly carried “Remember Well,” a ballad that he imbued with aching sincerity, and “Cry for You,” a tough-minded plaint jointly…