I have a bee tree and it has had honey bees for more than 20 years. In the past year strange things have been happening. Bees come to my windows at night like moths. I have never seen them attracted to light in the past. The colony will almost collapse and then recover from a new incoming swarm finding the nest and the cycle starts again. In the morning I see lots of bees on my deck. Some are dead and others are dieing. Bees are in my house every night and come in an open door to the light. I find many dead under the windows outside in the morning after banging on the glass all night long. I like to photograph them with my video camera and you can see some of the video on google video at this link.
I dont use insecticides because of the bees. I dont think this is the CCD problem.. seems more like a disease or parasite to me... or a combination.