fMMS is a python application with a graphical frontend for sending and receiving MMS on the N900.
fMMS on talk.maemo.org
Dev blog: CURRENTLY EXPERIENCE SOME TECHNICAL DIFFICULTIES. (blog.frals.se)
Garage site: https://garage.maemo.org/projects/fmms
Bugtracker: https://bugs.maemo.org/enter_bug.cgi?product=fMMS
Thanks for testing!
PS. I'm not above accepting donations for my work: