I have a couple suggestions, but I think the one that is the least work is to merge contacts. You could, I think, isolate each account and turn off sync, then set view to those contacts and delete them. Do that for the 3 you don't want to show, the sync just your main account and view those contacts. That would be a lot of work though, and I'm not aware of how gmail may be set up on the Blackberry. I've asked the mods to move this to the blackberry forum for more visibility.