Skype MyBB!
Add a Skype™ status button to users posts, and a link to call them
Skype MyBB! is a very simple plugin that adds Skype™ functions to your mybboard.Activate it, and you will add a "Skype ID" personal field to each member User CP. Members who will use this field will automatically have a Skype status button under their posts.
Any user will be able to contact members simply clicking on that buttons. Easy to use!
Discussion:
http://community.mybboard.net/thread-24359-page-1.html
Installation Instructions
http://mavericck.mybboard.it/