Do you happen to realize how long Yellow Tab has been selling Zeta? It's
been around since at least 2002, and I think they've been selling it since
2003.
http://www.yellowtab.com
Also, lets not forget OpenBeOS, which is now known as Haiku
http://www.haiku-os.org/
For completeness, we shouldn't leave out BeOS Max.
http://www.bebits.com/app/3892
Zane