Heather Armstrong, pioneering mommy blogger and founder of Dooce.com, has died at the age of 47. Her death was confirmed by her boyfriend, Pete Ashdown, who said she had died by suicide at their Salt Lake City home. Armstrong was known for her honest and open approach to motherhood, her struggles with depression and alcoholism, and her popular website Dooce.com, which she began in 2001. Her death is a tragic loss for the blogging community.