Yuri

Lately, I've been really getting into yuri anime and relationships. It's really strange because before that, I was only into yaoi or het. But then I've started watching the anime Simoun where the girl-on-girl kissing and yuri relationships are rather pronounced. And there was this cute scene in Tsuyokiss where the president of the student council got all predatory on her secretary - that one was really cute! 8D Before that, the only yuri series I watched was Kannadzuki no Miko which was more than a bit boring (though the brotherly relationship there was kinda interesting XP). Only the Zero couple in Loveless raised my interest but that was it. Oh, and I mustn't forget Mai HiME and Shizuru and Natsuki. Wow, that one was rather intense!

So, now I'm curious - are there any interesting action/sci-fi/mystery anime out there that would focus on a yuri relationship?