802.11n is nearing full ratification as the next step up in wireless technologies, with 83% of the IEEE 802.11n working group approving the existing specifications. If things continue as planned, final ratification should happen in about a year and a half, despite pre-N products already being available. With many of the competing companies finally agreeing on one specification, more manufacturers will be willing to produce N equipment, so we may see an increase in products even without full ratification for some time.
While 802.11n does not solve any of the base issues with home wireless networking such as interference, it does provide a superior modulation as compared to B or G and can help push wireless as a more viable alternative to wired where speed is concerned.