Engadget: Audiophiles are quick to name the umpteen flavors of Dolby, but at the risk of oversimplifying things a tad, there are just three types of surround sound today -- each easily identified by their plug. Virtual surround uses just simple stereo jacks, emulating multiple channels from two, while digital surround travels across optical or coaxial S/PDIF cables (or HDMI) and has to be decoded.
KnowTechie writes: "If you’re using a Magic Mouse user, listen, this isn’t an attack. The mouse was good enough for me to use it for nearly a decade. But keep in mind, there are better options out there, and this $35 option from Logitech is one of them."