So I’m relatively new to Skype. Love it, great free service, blah yada blah. Great for talking to the family at home.
It never occurred to me that when Apache started complaining that it couldn’t bind to port 80 that Skype had hijacked the port for its own foul purposes. ("In Skype, we don’t share ours with anyone" for anyone that is familiar with that joke.) Anyway, problem is now solved (quit Skype, apache -k install, start Skype).