What he's asking is: can I just use WiFi (like a laptop) to get to the email web address without paying for a BIS Blackberry plan? He knows there's no push email without a data plan. And can I just use a voice plan to SMS txt my wife without a data plan, pay by the txt? The answer is I don't think you can use WiFi without paying for a BB plan. I'm not sure about SMS txt, I think you can use that feature without a data plan (but not MMS pix messaging), at least with Tmobile. I don't know about ATT.
BB 8900 Tmobile, Moto Droid Verizon