I've known Heidi Dangelmaier (yes, Dangelmaier) ever since she won an Industrial Design Excellence Award several years ago. She was one of the few female geeks who started early in the video games biz. Now she's launched an all-girls--girls, not all-girl--media and marketing firm, 3iYing, that is generating buzz. The web site itself is wild and exciting, with lots of information about the girl market.
The deal here is to use girls to define their own market segment for corporations without any marketing research filters. A group of very smart, hip girls tell companies what is is hot and what is not in consumer markets. they offer advice on getting the message out to this huge demographic. Hey, why not? Think outside the box for innovation.