Talk to a realtor and have them hook you into their database with lakefront as one of the filters for the areas you are looking at. Gary Kaser, Drew Ross, LaPoint, Whitney McClintock-Rini, etc... can all help you with this. They are all active here.
I've been looking for about a year now. I get alerts a few times a week regarding new lakefront home listings. The market finally seems to be cooling down a bit but prices remain high.
Where are you looking?