MMSLIB is a PHP library for decoding and encoding MMS (Multimedia Message Service) messages. Use it to create your own MMS Proxy-Relay, as the library author has done for his own Peffisaur (nee MMS Diary) app [MobileWhack]
There are many uses for this – like not paying for each message, not having your messages tracked and saved by your carrier or perhaps creating a service for anyone to use… 😉