I have assisted with the content (international coffee trade) and the
structure of www.thecoffeeguide.org which opened in March 2005.
The website is mainly for users in developing countries - often with
modest facilities and limited navigation skills.
99% same content in www.leguideducafe.org and www.laguiadelcafe.org .

Next to no action has been taken re registration with search engines
or elsewhere. 
Please give me some advice on where and how to register/list the
website in order to be "found" by potential users in the coffee sector
(growers, cooperatives, advisers, certifiers, exporters, researchers,
press, ministries....).

Supplement:  
Your spontaneous comments of any kind - in particular
critical/constructive - on the new website are also welcome, but do
not spend too much time on that.

Be sure to register with Google. Everyone use Google to search. 
Not sure about other countries, but being from india plz visit
http://www.indiacoffee.org/  and
http://www.indiacoffee.org/directory/default.htm
Hopefully it helps