Eric Hahn

developer of Look Out

was CEO of Collabra Software which was acquired by Netscape, where he became CTO.

Collabra was the name of the Netscape newsreader client, and Collabra Server was an NNTP server, but I'm not sure whether they came from Collabra Software or was just a renaming of something else.

http://www.computerhistory.org/about/board/bios/hahn.shtml

Doc Searls interview with him at the time of Netscape's acquisition of Tim Howes' LDAP team.