So, another rant because someone didn't do their research on the device before purchasing.

You CANNOT do push email on a Blackberry without a BB data plan....even with a wifi BB.

You can use a wifi BB with no data plan if you just want to surf the web. With TMo's feature enabler, you will get IM which includes BBMessenger which needs pin messaging enabled. That's all you get, though.

Next time do the research. Enjoy the iPhone.