Kind of a minor idea, but I suspect there are more people out there like me, who use Email for pretty much everything, and text very, VERY seldom.
There are really only two reasons I would receive a text message at this point (and I never send them):
1: One of my friends didn't get the message that I don't DO text messaging.
2: A necessary text, like an account-confirmation number or something of that kind.
The second item precludes me from simply de-activating text from my device entirely, but the former means that if one of my friends drunk-spams their friends list, I end up with ONE text message on my bill for the month, and that single message kicks me up to a full hundred messages, and costs me $3! That's one hella-pricey text message.
I would propose that a $.50 "Tiny" package or something like that, call it 10 messages or so, would be very nice. That way, the person in my boat who doesn't send any, but occasionally has one show up, doesn't end up coughing up for a service that's over 95% wasted.