Robert Christgau, the music critic who was dismissed from his longtime job at The Village Voice last month, will soon assume a regular gig on National Public Radio. Bob Boilen, the host of NPR's "All Songs Considered" program, made the announcement while introducing Christgau as part of a roundtable previewing fall CDs on the Sept. 21 show. Immediately after being introduced, Christgau blurted, "I need a job. I got one, I need more."