I initially wondered, "Would most of the unanswered questions would be poorly-written questions that didn't really need an answer, aside from an initial comment or two?"
After I looked through the list, though, I thought: Indeed, a few questions fit that description; however, as I looked through the list, I also found some questions that looked quite good – they simply didn't have an answer yet.
So, do we need a "community plan"? I don't know about that, but it's probably not a bad idea for ELL regulars to at least keep an eye on that list every now and then, and look for good questions that maybe slipped through the cracks.
Also, perhaps we can give this idea another mention during the Winter Bash. (I'm not sure if we'd get a hat for resurrecting an unanswered question, but who knows? Even a potential hat might be just the right impetus to find an unanswered question and finally give it a well-deserved answer.)
Note: I don't mean to say that we should wait until the Winter Bash; I'm just saying that we might have a spike in this activity at that time of the year.