I wasn't necessarily going there. First, popping your SIM card into her device will NOT in any way activate her on your company's BES. She would not receive any email from any account at all! It would only give her BlackBerry data to download the app.
However, your wife will need a BlackBerry data plan to use BBM, so this all seems moot.
The difference between stupidity and genius is that genius has its limits.
When you take things for granted, the things you are granted, get taken.
Even a mosquito doesn't get a pat on the back until it starts to work.
Too many people miss the silver lining because they're expecting gold.
[BES 5.0.3 / GroupWise 2012 HP2]