MIMO is all bursting out all over, so apologies for the headline: At CES, video was on everyone's mind hence the explosion of multiple-in, multiple-out antenna technology in which more antennas result in much greater bandwidth and enormously higher throughput. Belkin was first, and now Linksys (already), NetGear (soon), and D-Link (near future). PC World has a great run down.
NetGear will use an additional technology in some products called BeamFlex which incorporates elements of beam forming such as is used in phase-array antennas. Given how, uh, successful that's been in the enterprise market, let's see how it plays out in a home device. It's a neat idea, though, and can be used to assist plain 802.11g and MIMO.