Ok- so I think I already know the answer, but thought I'd ask to be sure anyway.
Had my first crash today (I'm kinda proud of it, actually- I always wondered when it would happen). Did an organized ride and my tire got caught in a road groove less than 1/10 mile from the finish. I flew off and hit the pavement. I think my head hit hard, but I really don't remember for sure how hard it was. I think I was going about 16 ish mph- so not terribly fast.
No cracks in the shell or the foam, but I'm guessing I should replace it anyway, huh?

Aside from the major road rash on the shoulder and the bruised hip I'm fine. Just embarrassed that I couldn't catch my breath and was a little weepy when a group stopped to help (and thankful that I didn't fall into the line of traffic). Crashes always look kinda cool on TV- but it's not as fun when you can't watch it happen (I'll bet it was cool looking, tho).

Is it weird that I'm proud of this like my mtn bike crashes? I want to show off my cuts and scrapes. It's kinda like a badge of honor...

New helmet, huh???