One person who has the time and dedication for such an undertaking is going to have to step up. It seems like many of the other volunteers are like me: They'd like to contribute, but they have things that prevent them from devoting all their free time to such a project.
Maybe looking back at old ideas, and instead applying them in a weekly online digest (rather than a daily) would get people more seriously interested. A weekly wrap-up where we could look at the big albums and bits of new of the week, and perhaps run a few features: the roundtable idea, looks back at old favorites, history lessons, and lengthier opinion pieces on other subjects.