French Wines

I realised this weekend that one of the main reasons I rarely drink French Wine is because I have little idea how a French Wine region maps to a grape, or blend of grapes.

Whilst I can buy a Merlot or a Pinot Noir or a Shiraz and know what I'll be getting, I have no such intution for French Wines.

Is this something I just have to get over by developing a parallel intuition for French Wines (an investigation that would not be entirely unpleasant) or is there a mapping table somewhere? I couldn't find one with a cursory search on Google and Wikipedia...