I think it is a great idea to add VirtualBox guest additions to Jockey.
It would make it easier on novices.
However, I think we need to move away from proprietary drivers.
We need to continue pushing and moving toward blob-free.
Why do you need to install VirtualBox guest additions?
Why doesn't it "just work" out-of-the-box?
Modems are still used for faxing (yeah apparently that is still being used to) and some phone handling.
Canonical needs to fit Ubuntu on to a single cd for several reasons, so 150MB is a huge 20% of the total budget.
Sucks to be you then.