Back when I was in college, one of my courses (Statistics) required me to design and administer surveys. Finding willing participants isn't always easy. That said, I just completed this survey for a university project and it was requested that I post this to assist with finding other bloggers.
"If you are a woman who writes a blog with content predominantly about her family, and you have 10-15 minutes to spare, we would love to hear from you! We are doing research on bloggers, and invite you to take a survey at www.surveymonkey.com/s/mommyblog Your participation will help one graduate student get one step closer to completing her thesis, and one step closer to graduation! Thank you for your input and for your time!"