Well with all this interest in HDTV antennas surely some people are also looking for ways to increase their WiFi range as well. Rather than repeat it all here I figure I'd direct you to the website which I stored my documentation of the project. I didn't get very good results with my Parabolic Trough setup, some of which could be attributed to the wireless adapter I used. Please take a look and give me some feedback on how to improve the design.
(Don't worry this is a projects only blog, this isn't a trick to get you to hear about my personal problems)
http://flashedarling.livejournal.com
I think my next attempt may be a wok conversion.