Of course, YMMV. It isn't free, but it does have a full 30 day eval, and the app is inexpensive.

CfosSpeed - http://www.cfos.de/speed/cfosspeed_e.htm

I have definitely experienced better Upload/Download speeds on my wireless connection in the week that I've been testing it out. Less lags for pages to load as well.

Run Rdilly before installing Cfosspeed so you can go back to square one if you have problems after installation http://www.joejoesoft.com/vcms/124/