LIAM FINN A one-man band from New Zealand, Finn plays all the instruments and sings all the parts on his debut, "I'll Be Lightning." He takes cues from indie folk-pop forefathers such as Elliott Smith and Conor Oberst and reveals hints of his father, Neil Finn of Crowded House, with his tender, multitracked croon and lyrical style. But he chops, blends, and twists his keyboards, guitars, electronics, and melodies into a shiny new beast that is both gentle and subtly feral. "Lightning" strikes Jan. 22, and Finn plays the Middle East Upstairs March 22.