> SUSE ... openSUSE.
> Gentoo has corporate involvement too, does it not?
Not in the same way. While various companies (corporation and otherwise) may provide mirrors and/or donate hardware and the like, and google itself is a notable example of a gentoo downstream (with chromeOS), gentoo seems to be much like the kde of the front-page article, in that it's very much individual developer driven, with companies as such not allowed to get too close.
I believe there's a parallel to debian there. Both gentoo and debian are 100% community distros without a sponsoring corporate parent, as such. The model is quite different from that of fedora/rh, or opensuse/suse, or mandriva (closer to mageia I guess).
It occurs to me that I don't know where arch fits in, community/corporate-sponsorship-wise.