If you guys own an Apple TV or any iOS device you should check out www.ioslivetv.com
it's got a huge amount of high quality live TV streams for various countries including the US and UK. There is a plugin available for XBMC but I find the quality to be better using the browser on aTV or the phone. For more info regarding the plugin check this site out http://supercloudtv.com/
They also have a pretty decent adult section for those interested in that genre.
Enjoy it while it lasts