Broadcom’s BCM4335 chip will be available in Q1 2013 for mobile and other small devices. Among other things it provides the latest Wi-Fi speed improvement by supporting the 802.11ac amendment to the wireless networking standard.
Buffalo have announced their AirStation WZR-D1800H equipment will be available in June with 802.11ac. It includes a 2.4GHz 802.11n radio for backward compatibility.
Smallnetbuilder says the Buffalo WLI-TX4-1300H model will be 802.11ac only.
Netgear announce R6300 for 802.11ac