I've recently committed the beginnings of support for Econet under NetBSD.
At the moment, the code is capable of handling all the basic types of
Econet transaction (unicast, immediate and broadcast, in both directions),
but lacks support for any higher-level protocols (including allowing user
programs to handle raw Econet).  It also lacks any mechanism for retrying
failed transmissions.  These will both be corrected fairly soon, as long
as I don't get distracted again.

-- 
Ben Harris                                                   <bjh21@netbsd.org>
Portmaster, NetBSD/arm26               <URL:http://www.netbsd.org/Ports/arm26/>