Great... good discussion.... I don't think a mvc framework should go in the core framework of flex... It doesn't make sense.... I agree on that 100%
The idea of extensions sound great to me, but I don't have a lot of experience with this idea on an opensource project to suggest a model that would work.... The only experience I have is with Dokuwiki and a little from Eclipse. What I got from Dokuwiki is that if the core team is not somehow compromised with the extensions, they simply die with time and they start not being available for future releases of the core.... So with time people just stop using extensions because they know that with time they will break.... So sometimes it is simply no worth to have them if anyone will commit to it... I mean... If there is no roadmap where the extensions have some or any importance.... Eclipse is a project that embraces the extensions for example... That model seems to work.... The extensions have value for the overall goals of the project... Rafael Santos - Specta @rafaelspecta