Canonical doesn't want to include Wine, because they are trying to provide a complete desktop experience. Wine is a necessity for many people, but Canonical wants to market Ubuntu as the Linux distribution that works well for normal usage. Including a half-working Windows-emulator (functionality emulator) doesn't fall within that mission. It gives the message that Ubuntu on its own isn't ready (true or not). Why would they want to switch from a good product (Windows) to an inferior one with spotty support for Windows applications?
I don't see them providing packages for proprietary applications. Not for the Ubuntu project, which is completely free (except drivers). Maybe through the Canonical store, which also provides a legal but proprietary DVD player.
Remco