Santa Barbara-based Sonos, the maker of the user-friendly, multi-room, wireless music streaming systems, said Tuesday that its products are now available at over 6,300 retail locations in North America. Sonos said its product is now being carried by new retail partners, including Target, Best Buy, Brookstone, Micro Center, Future Shop, hhgregg, P.C. Richard & Son, Microsoft Windows retail stores, among others. Sonos is headed by John MacFarlane, and venture backed by BV Capital and Index Ventures.