On the importance of giving your teens space to grown into adulthood when they go to college:
http://www.thespec.com/news/local/article/600204–cutting-the-electronic-umbilical-cord
and how to cope when they go:
http://novi.patch.com/articles/the-college-transition-coping-strategies-for-parents
http://lowermoreland.patch.com/articles/college-101-what-happens-after-move-in-day-4
http://www.courierpress.com/news/2012/jul/02/communication-helps-parents-child-through/
On the benefits of staying in touch:
http://www.dailygamecock.com/viewpoints/item/2337-stay-in-touch-with-home-to-ease-concerns
and on their potential homesickness:
http://www.huffingtonpost.com/brian-harke/mom-i-want-to-come-home_b_935846.html
And on how parents can keep in touch via new technologies:
http://www.pittsburghlive.com/x/valleynewsdispatch/lifestyles/s_754061.html