[gentoo-user] Master list of all Overlays

[James]

Hello List,

Does 'Layman -L' yield a comprehensive list or does
it just poll from a subset of the different Overlay
from a select number of sites?

Does such a list exist that references (most) all 
Overlay repositories and the Overlay ebuilds therein?

Are there sites that are known not to trust?

If 2 different repositories have different
(hacked ebuild) then where do you get
information as to which one you should use?
Sure testing them both is warranted, but maybe
there is a site where these Overlays are close
to becoming stable enough for inclusion in portage,
maybe a last stage clearing site or such?

Do some sites have standards and other sites
let anyone put up a development ebuild?

'layman -S'
Are the listings automatically refreshed or 
do you (should you) issue one master command to sync (update) 
all of the repositories or sync per each repository?

Just looking for some feedback on these non
official ebuilds, in a general sense. I have had
very different experiences with Overlays and was
wondering if I have missed some wisdom along the
way..?


http://en.gentoo-wiki.com/wiki/Overlay#Listing_and_Adding_Overlays
Best reference on the subject?

James