Just that really!
I stopped bfing DS a few months ago, around his 2nd birthday, and my boobs were still producing teeny amounts of milk ages after but I was avoiding 'bothering' them in case it kept it up.
This morning I was rubbing a bit of dry skin off righty's nip and lo and behold - colostrum appeared! Actual colostrum, completely clear, yellow, sticky. Have checked, and could express some too. Tried lefty, and it also produced, more creamy but still yellow. 
Boobs are a bit swollen and tender too.
I'm due on any day and can't POAS until DH gets home, so Saturday morning at the earliest. First cycle TTC #2, so v happy if I am pg.
Can you produce colostrum if you're not either pregnant or bfing?