Not sure if Sonke and Martin have seen this yet, but Andrei made a post
over at digitalmars.D calling for DUB to finally get added to DMD
distributions:

http://forum.dlang.org/thread/mkg3sm$1bk4$1@digitalmars.com

My (perhaps mistaken?) understanding was that there were still things
the main DUB devs wanted to take care of before being packaged with DMD,
so you may want to chime in over there.