Thanks very much for taking the time to answer my question. However, and I'm not sure that I can entirely agree that not having a open searchable Forum for Omeka.net users is really as open as having one.
For one thing, as a new Omeka.net user, I am just as interested in the questions of new and prospective users as I am in the answers of support staff. An open forum would make it possible for prospective Omeka users to see the difficulties and frustrations registered by users of Omeka.net, as well as to find more information about solutions and work-arounds. What are some of the uses to which users of Omeka.net have been able to put the custom .css module? It would be interesting to read a forum thread on this; however today Omeka.net users (and developers) are, unfortunately, left guessing about questions such as this, and other features of Omeka.net, which are not documented in great detail.
it seems probable that the lack of an open forum deters some potential users from trying Omeka, since the support process is unnecessarily hidden from public view. For every user willing to begin an email support conversation that may eventually help them to figure out whether Omeka.net will suit their particular needs, there are probably several who will give up. I would suggest that having a larger searchable archive of forum questions and answers available online would work to increase the number of new users trying Omeka.net, by giving more users more information quickly about what Omeka.net can and cannot do, and about the nature of the support that is available.
In any case, thanks to everyone who contributes to building and supporting this helpful tool.