Not at the moment. It supports most of the standard unix vi commands but not the enhanced vim ones as of yet.
Ability to edit files off Box / DropBox is a big plus. Is there a mailing list or something like that (some RSS feed for a development blog) where I will be able to see when updates are made? I would like to start using this as soon as features like vertical column selection / yanking and pasting as well as line numbers are put in (the nature of the files I have on DropBox call for those features :|)