I've touched on Jaime/Cersei occasionally but it's usually in comparison to one of their relationships with another person. I haven't really looked for any Brienne/Sandor fics and Brienne/Cersei has never entered my mind (and I'm all about the rare pairs, so that's something I'm going to need to see asap)

I've written a few things. Most are on my LJ (cmk418 is my name on LJ & Ao3) and I'll be doing a re-post over to Ao3 at some point (I'm going fandom by fandom so it may be a while). There's Brienne/Pod, a few gen items and a whole lot of femslash.