Her intro: "Soulbonding, or what happens when the author gets out the superglue. I am of two minds about soulbonding in stories. (Let me make it really clear up front that I'm talking about the trope/cliché in fiction in which romantic partners share a mystical link between their souls, not about anything real people get up to.)..."
There's some K/S in there, a bit of Sentinel, a lot about Mercedes Lackey (I've never read her books but I sure learned a lot from the comments), and a whole bunch of other fandoms. Fascinating discussion.