I've been totally loving Hot Club De Paris recently. They have some fairly impressive influences like Cap'N Jazz, Don Caballero, and XTC, but have managed to distill them into tight bursts of math pop. Unfortunately, their most recent album isn't available in the States yet, but you can get the first one at iTunes and Amazon MP3.
Hot Club De Paris - Let Go Of Everything
Hot Club De Paris official site
Hot Club De Paris on MySpace