I've worked and volunteered with some really amazing organizations through out the years. Most of the advocacy work that I've done was while I lived in New York. I've donated some money to a few non profits since I moved south of the Mason-Dixon but unfortunately have not developed any relationships with the people doing the vital and hard work.
With so many worthwhile causes I feel passionately about, it's been difficult to find the right one for right now. But the atrocious murder of Dr. George Tiller has me leaning towards a reproductive rights organization. John Colle's Balloon Juice has a testimony in the comments section from the partner of one of Dr. Tiller's patients that may be illuminating for those unaware of doctor's work.
I've had my issues with NOW but they are correct in defining the assassination of abortion care providers as a form of domestic terrorism.
May Dr. Tiller rest in peace.