On Wed, Jun 28, 2006 at 07:54:12PM +0200, Kevin F. Quinn wrote:
> You don't have to do this
> for binary files copied from a Gentoo Live CD, as in that case you're a
> third party (like a courier, or the postman) and can can simply refer
> back to Gentoo. 

According to the FSF you need to provide the sources also for things you
did not modify (see the link ciaran provided), because you are
redistributing those binaries and distribution means you have to provide
sources yourself. It is not enough to refer to other parties, because
those other parties can take their sources offline and you will still
have to provide your users with the sources if/when they want them.

You are responsible for providing the sources of any GPL binaries you
distribute.

Maurice.

-- 
Maurice van der Pot

Gentoo Linux Developer   griffon26@gentoo.org     http://www.gentoo.org
Creator of BiteMe!       griffon26@kfk4ever.com   http://www.kfk4ever.com