i was able to move one of my accounts off my main bnet to my other one ( i only have two ) I had to call to get it done. I was worried having a full bnet account would keep me from getting a beta account ( it turned out to not matter, you can have 8 normal WoWs+beta ) The CS rep moved my 8th account to my other bnet and was very pleasant the whole time.

the CSs saying the "can't" are lieing.. they can! But maybe most will not!