www.winesofcanada.com - a good summary of the wineries of Canada.

www.drinkwine.com - sponsored by leading wineries, mostly contains links to other wineries. 

www.kj.com - Kendall Jackson winery home page mostly for purchasing wine, but the Education section is very good.

www.wine-lovers-page.com - more information than you know what to do with.

www.rcbowen.com/DrBacchus - a bit odd, but there is some good information on Shiraz.

www.francetourism.com/wine/wineinde.htm - good maps of the various wine regions of France.

www.winespectator.com - another one-stop site that can be a bit overwhelming.

www.winedictator.com - not a bad site for basic wine information.

seaborg.nmu.edu/cw/wine.html - good basic information, cool name Veni, Vidi, Vino