there are a variety of Office Connectors popping up now to allow integrating the MS Office Suite

MS-Project is not part of MS-OFFICE suite, and such connectors do not exist.
Only exiting API is a Java API to read MS-Project files, but it does not allow to write file because format used is copyrighted by Microsoft (thank you bill :silly: ).

. The advantage to this approach would be allowing the editing of any project in ProjeQtOr in MS Project saved back to Projeqtor

This will never be possible, not only because of technical constraints, but also because ProjeQtOr and MS-Project use very different ways to plan a project.
Import of Project from MS-Project will be possible only to import existing project to ProjeQtOr, not to allow bidirectional updates.

I would like to recommend using XML as the import/export format from ProjeQtOr as MS Project already supports xml.

This is already used ofr Export : ProjeQtOr can export Project to MS-Project XML format.
Import is not available yet.

Thank you for the explanation babynus. I'm of the opinion that if you don't ask you will never know if something is possible.

It would be nice to see the import of a MS Project XML get moved up, but I understand there may be features that are more important to your global user base.

Just so you know, there is a commercial online project management application and an open source project management application that both have a connector to MS Project. They call it something like Office Connector and it is an add-on to MS Project. Apparently it provides that same functionality to Project that Office products have for opening files from a server. However, in terms of open source applications, I am finding ProjeQtOr has more of the features I am looking for.