I bought a 300Mbit/s WiFi-dongle for the HTPC …

A Linksys(by Cisco) WUSB600N:

http://homestore.cisco.com/en-us/adapters/linksys-WUSB600N_stcVVproductId53934627VVcatId543906VVviewprod.htm

It is not the latest and the greatest but I found it cheap(29$) and it seems to be speedy enough. I had no problem streaming 1080P HD-movies to the HTPC using this dongle. I was lucky enough to get the v.2-revision which included Windows 7-drivers on the disc so it actually worked out of the box. But, the drivers seems to be a sad story according to what I found when browsing the net. Lucky enough so is there a OEM-driver from Ralink, which makes the chipset for this Linksys dongle, available on the net. Not from Ralinks own site, as it seem to have been down for quite some time. But there is a site named “Wikidrivers” hosting Ralinks latest drivers. Here:

http://wikidrivers.com/wiki/Ralink_RT2870_3.2.3.0