Just figured this series deserved a shout-out. The story is intriguing, the villains being set up are formidable and the art consistently outdoes every other modern comic running right now. It's not just the lines and colouring, either... The artist takes fantastic liberties with panel structure, which often lead to breathtaking pages. Here's an example with Killer Croc.
The best stuff is in the Hydrology arc, however. The Weeping Woman is a great villain that makes for some even better art.
Anyway, just thought I'd give my fellow comic readers the heads up: Batwoman is awesome, and if you're not reading it, you should be.