That Poets Corner especially could be very handy - a poetry supplement to the DT, for when a link to a poem seems relevant in a discussion thread.

But I've yet to see any site that comes within reach of the Mudcat forum, even when it's at its occasional worst. (I admit I haven't really bothered looking for one since I found the Mudcat -I spend quite enough time here, and collectively we know an awful lot about just about everything, and are happy to share what we know and what we have found.)