Best relationship/synastry writing about relationships that I've seen:
- Jenni Kosarin's "He's Just Not In The Stars" book.
- Jeffrey Kirshner's "Seduction Central" site.
- And for advice-y-ness, if not so much always with the astro-nitpicking, there's Elsa.
I just thought I'd pass that on. I really need to freaking write up a review of the book sometime- it's awesome. Seduction Central in its own way seems to be the net equivalent, if working different.