Collaborative computing, Exchange and Windows Server Engineering, PowerShell for Exchange, and the next steps that will evolve as traditional corporate email goes mobile, cloud-based, instant, and social.
Skype requires me to look at you while you're talking, which is totally ridiculous. The only sci-fi show that understood this was Star Trek. Bones and Jim would use their flip phones to talk quickly about beaming or health issues. The only time they'd fire up the videophone was when a Klingon was sitting in a spaceship 20 yards away with guns pointed at them.
Call Me! But Not on Skype
This is a great little rant about video phones and why we aren't as exited about them as one might think.