I don't know much more than I've already posted. This thread has some info, even though it's primarily about their N55 tune: http://www.e90post.com/forums/showthread.php?t=548191
I confirmed in another thread that they have a 335d tune, and in fact were supposed to install it in a car in the past week. They have not updated since then.
If someone is really interested, they can always call or email them.