Can We Send M.M.S. To Mobile Via Computer?

There are some websites that are providing facility to their customers that they can send MMS clip from computer to their mobile. Check this website for details.
www.experts-exchange.comProgramming/Wireless_Programming/WAP/Q_21081575.html

You can text to cricket phones for free-go to mycricket.com and click on send text (orange bar top right). You get like 153 characters I think, but you can send as many as often as you like.
I don't know about other carriers- all my friends are cricket people:)