OH no! how ironic, I was just talking to Kristen (Kris10 on here) and she just found some in her girl's hair too, she's going to post about it when she gets home... she has a good preventive idea but I'll let her post it to you guys.
Good luck, Aaralyn had them once but it was caught really early and didn't get bad but what a pain to get rid of keep rid of anyway!