Sending txt messages by other means?

[Torx]

Im trying to be a little more conservative about my sms usage considering ive only got 300txt a month with sprint.. and with friends that are txt happy, mine runs out real quick.

I dont even know if sprint will hook me up with more without signing a contract.

But back in the day i used to be able to send txt messages from outlook express on my computer. I would send to their phone number.. 901-xxx-xxxx@sprintpcs.com

that saved me an outgoing txt message
so im wondering if you can still do this, or is there an application for winmo that uses data to send sms rather than the conventional messaging app.

thanks.