Sonos

The second-gen multi-room audio setup maintains Sonos basics (wirelessness, flexibility to play the same track everywhere or different songs in different rooms, a single handheld controller), while beefing up wireless range, shrinking equipment while maintaining sound quality, and offering direct connectivity to e-services like SIRIUS, Rhapsody, Napster, Pandora, and Audible.com books, because nothing gets a key party going like Danielle Steel's "Toxic Bachelors".