Christmas Lights in Louisville

A friend of mine suggested that I might know where all the good neighborhoods are for Christmas light gazing. Since I get out of the house rarely and spent MAYBE 30 minutes on my own house, I was at a loss for what to tell him. Then it occurred to me that nothing is better than the web for consolidating good information from a bunch of different places. So, sound off, Louisville. We're all depending on you to deliver the Christmas bonus here. Where are the great Christmas light displays around town?