If I get Y, then I'll do all my challenges on that. However, I don't plan on getting it, so I don't know.
There really isn't enough poetry going on for Poem of the Week. I know there used to be a poetry sub-section right when I joined, but that was demolished because of inactivity. Now, there's almost no poetry to be seen. I know WhiteKnightL currently has a poetry thread going called Legacy, which is the only one that I know of. So, no Poem of the Week (or month) right now. However, Skunter started up a biweekly haiku contest, so there's that.