Have Skype, will travel
Spotted in BeyondVC I think the combination of voice over IP and presence information is very good. BigCo IT departments are trying to stop this citing security and bandwidth problems. I have not seen mention of any Skype security concerns. On the subject of cost savings from Skype, they can be used to justify upgraded infrastructure.
If anyone has seen any case studies on adopting Skype ( or similar) in a corporate environment, let me know.