On IC to Countdown Timing (Lightly spoilery for, well, just about everything:
- Far as I can tell, the current issues of JLA and JLA: Classified are set right BEFORE Identity Crisis. There's going to be an IC tie-in with JLA fairly soon, when this storyline ends, and of course, the Super-Buddies features Sue, Ralph, Ted and Booster, so that's obviously back a bit.
- Current issues of Teen Titans, Green Arrow, JSA, Flash and Outsiders are set squarely between the two events. The Speedy AIDS story dovetails fairly neatly into the Titans/Dr. Light story, and they both come pretty quick on the heels of IC. JSA has Black Adam being inducted into the Secret Six, so it's obvious that the current story takes place right BEFORE the Coutndown events. It shouldn't be surprising that all of these titles are written by either Johns or Winnick, and thus mesh well with the mega story.
- I don't read Wonder Woman, but as it tied in briefly with Flash, we cna only conclude that her blindness happened somewhat after or during IC--we don't see her face after issue #1, I believe--and is resolved before "Countdown."
- Seven Soldiers ties in to Grant Morrison's run on JLA: Classified, what with Neb-Uh-Lah or whatever his name is, but I'm unsure how it--and particularly Zatanna--fit with everything else.
- Not reading Superman or Batman. Have any of the reprecussions from IC been felt there?
Just a note: it'll never be an exact science. Trying to make it one will just drive you nuts.