I am looking for a MSN Messenger app that uses text messages instead of packet data/airtime. I have searched, but cannot seem to find one. Any recommendations?

If you can get MSN msgr to communincate throught the email address your text msg uses, then perhaps you have a chance. I always thought that IM thru txt was the best choice, but since it would be CHEAPER for the customer, all the carriers nixed it in the name of profit.
To get your email address, just text a message to your email. Not many people know that text is really just super abbreviated email & that all text accounts have real email addresses.