There is a very interesting discussion going on in David Morley's blog about long poems, which follows on from a debate at The Troubadour a few weeks ago.
And I picked up wind of a conference on Long Poems at Sussex University via Carrie Etter's blog. Wish I'd heard about it before it happened... If anyone reading this was there, would be great to hear how it went. Any further recommendations of long poems much appreciated.