Unschoolers on the 'Net - This is a *great* site for Home/Unschool teenagers. It has a chat, links to homeschoolers personal pages, an archive of writings all written by homeschool teenagers, a *very* long survey (over 150 questions), and of course, the Unlist (A list of net.unschoolers and information about them... great place to pick up penpals).
HOST - Another great site for homeschool teenagers with a bulletin board, several point of views that different homeschoolers have on homeschool, links to net.homeschoolers webpages, and a place to find penpals.