Green Carnation here as well...
Though I have heard that Dweezil Zappa has a song he wants to release that is supposed to be around 72 minutes! I'd like to check it out, since every other l0ong song I've heard has been good.
Is there something about creating a really long song that makes artists put a lot of effort into, thereby causing it to kick ass?? It's worked for EOS, Green Carnation, and Opeth, taht's for sure....