> What if TNF makes a CD of binary packages, and sells it? Under 3a, all
> such CD's would have to include complete source, but under 3b, you can
> just say, "Go download it" (in writing). I suppose we could make it a
> point not to sell CD's with packages that are over three years old.

Actually "Go download it" is not enough.  See:
http://www.gnu.org/licenses/gpl-faq.html#TOCDistributeWithSourceOnInternet

     christian