You still wont get BBM or email.
Your blackberry data plan is connected to your other SIM card, which means your phone is connected to that data plan. As your not using that SIM card, you have no data, wi-fi won't make a difference.
"That's it then. Cancel the kitchen scraps for lepers and orphans, no more merciful beheadings... and call off Christmas."
When I was still in the USA and turned off the phone, but kept the wi-fi active, I could use BBM. Why would it still not be active? If I were to use the original SIM and again turn on WI-FI but not he phone, would be active?