What's the best way to test sending/receiving MMS messages with Android?

I'm writing an app that stores secret (encrypted+hidden using steg) information in MMS messages. Obviously I need a way to test this, in particular, sending and receiving MMS messages. I have one Android phone, a Nexus One. I know that MMS's cannot be sent between emulator instances, but other than using up loads of 开发者_Python百科MMS credit, is there another way of testing out MMS sending/receiving without just spending loads of money?

Twilio just announced MMS support, and their marketing page has a test box to receive an MMS, could be useful for testing: http://www.twilio.com/mms

There are some websites that claim you can send a free SMS/MMS messages, such as http://www.text4free.net/ (have not tried it myself though) and commercial SW: http://www.nowsms.com/ (this one works for sure but is not free). Also there is a chance your mobile carrier allows sending messages via its website.