I don't know if any of you have read Lightning on the Wave's sacrifices arc, but I've got to recommend it, even though I know it has things in it that this forum tends to not like.
This is an early Harry has a twin plot monster, from before it became a bad cliche, and yes, there is a slash relationship, but not porny thus far (i'm finishing book 5). But there's femmeslash and het, too. The main thing is not the ship but the incredibly complex themes that this author has done, and her retelling of all 7 books comes to over 3 million words!!!
I really feel that if one looks past the ships, this is an incredible story, and something for the readers to sink their teeth into while we're anxiously waiting for the Authorlord to update his incredible AU.