It works, all three accounts!! I even got emails that i deleted on my BB to delete the emails on yahoo and gmail.
What I did was:
remove all three accounts. Set up the
email option on the blackberry. Then set up the three accounts all over again, but this time everything worked out great! I am not sure why, but I think it was the setting up the of the
kberry first that got it all going.
I hope this helps someone...