One thing that we need to do with MDC is to find content that’s missing — especially as XULPlanet starts winding down — and make sure it’s added to MDC. This constitutes both migrating anything not already migrated from XULPlanet but also writing new material where stuff is missing.
Please file bugs against Mozilla Developer Center in Bugzilla if you find any missing articles that you think are in need of immediate attention, so that we can prioritize getting them written or migrated! Let’s fill in those holes!
Of course, you’re also more than welcome (in fact, “urged” would be appropriate) to write or migrate the material yourself — there’s enough to do that I can’t do it all, so the more help the better!