I've asked Shawn to tackle that next... these two things were the most requested features on the forums and at Drupalcon. We should be able to turn out some very cool install profiles in the near future for restricted access sites and download sites.

I'm testing the roles module out now, and I'm not sure when exactly Shawn will get on the file downloads bit... hopefully we'll be able to work in conjunction w/ CpILL to get it done before Alpha 8.