I have also been checking online everyday, sometimes multiple times a day, to get a reservation at Le Cellier for my May/June visit. I have not been able to find anything. So I saw this thread and thought it couldn't hurt to call. So I called and got a ressie! Granted, the times are not prime time but I did get a choice of 4:30 or 7:30 (and I do NOT mind the 4:30 that much since it still gives us time at the park afterwards).
One interesting thing though is that the automated lady was booking it for me. I didn't talk to a live person until the automated lady couldn't figure out my name (they NEVER can - no matter how I pronounce my name and how much I enunciate the letters - and it is a four letter last name!) So when the live person came on, she had no idea that the automated lady could book it for me. Interesting...
Moral of the story - CALL for Le Cellier ressies!