I don't seem to see anything like that here... I think it would be a good idea.
That way, you could let people know which quests are must-plays.
Quest(s) of the week/month/year?
Well, we already have several Top Ten lists, included top rated and most downloaded quests. Also, after awhile, Gemstone will have a few excellent quests.
Well, you could just do a single Quest of the Month, featuring the best (recent) quests. Maybe on certain months you could feature a themed quest, like for December a wintery quest.
We've already discussed this in another thread and have decided that there isn't a great enough number of quests coming in to do this. Once 2.5 comes out, this could possible happen.