open-source friendly network card vendor

[David Christensen]

[e-mail]:

I've looked for a forum, mailing list, or newsgroup specifically
oriented for network card device driver development, but haven't found
one.  Any suggestions?

I'm looking for an open-source friendly network card vendor -- e.g. the
vendor publicly discloses the technical information required to write
device drivers.  Does anybody have any recommendations?  If so, can you
please provide URL's to their technical information?

TIA,

David Christensen
[e-mail]