There are a few older questions, which are classified as “unanswered” but to which a decent answer has actually be provided in one or multiple comments. Sometimes, a comment has even been posted to ask the person who provided the answer to write it as an answer. If, after some time, nothing of the sort happens, is it okay for another user to write a community-wiki answer summarizing the comments (or copy-pasting, with attribution, if only one comment contained the answer)?
I have seen it done on other SE sites, and nixeagle did it here. I thought it was a nice idea and then I did the same on another post when it crossed my path, but I wonder what others think of it.