With the e-mail functionality so well done, mms seems a little redundant. I would call it ahead of its time for dropping mms. However... I will say the way it handles it is annoying... You have to log in to some site to view it? Why not just convert it to an e-mail?
http://pleasefixtheiphone.com/
The lack of Multimedia messaging on apparently the worlds most advanced phone is my biggest gripe.