This is the term used to describe most local and wide area broadband wireless networks. These typically operate using the 802.11 specification(s), for example (note the different speeds):
802.11a (1/2Mbps)
802.11b (11/22Mbps)
802.11g (54Mbps)
802.11n (100Mbps > 1Gbps)
Most initial 802.11n (Draft 1.0 / 2.0) kit appears to be touting speeds of around 300Mbps.
Full Details:
http://www.ispreview.co.uk/broadband_wireless.php
Related Articles:
> WLAN - Wireless Local Area Network