Some books to add:
That Witch! by Zoe Lynne, so far it's really good. It's teen drama and crap but it's good.
The Girls of Alcyone series. About genetically alterrd girls raised as mercenaries in the 2300's. The two main girls are in lovers. Really really good, I couldn't hardly put down.
Troll or Deb - don't read it for the yuri, because it's more of an afterthought. Deb is a fairy skater-girl, she gets enchanted by a half-troll girl to fall in love with her.