Hey there,:
So they've published the spec a week ago and you already have a device using it? Blasing fast!
MTP, from what I've seen so far, has 2 folders at the moment (atleast on my MP3 device / iRiver T10). Music and Data. Music can only be written by software like Media Player 10, because it has to do with DRM. Data however can be written as a filesystem. The latter is what I would like support for (I don't care about DRM).
Did it, nothing to agree or to sign. FWIW, the document converted to PDF, only with opensource software, is available here (supprisingly, inside the document it's written that it's a draft):
Microsoft appearantly publishes the specifications, unfortunately for most of us it's Microsoft word format, in an executable. Would convert this for you, but I don't know how legal that is.
http://www.microsoft.com/downloads/details.aspx?FamilyID=fed98ca6-ca7f-4e60-b88c-c5fce88f3eea&displaylang=en