In a post published a few days ago on Skype's official blog, Jonathan Rosenberg, the Chief Technology Strategist, mentioned how the company managed to bring "real virality" to video calling by making the process as simple and transparent as possible.
Now that Skype has managed to get Facebook to adopt its VoIP service (whilst taking care to leave contact import and voice calls out of the equation), the next logical step would be to get Skype on Microsoft's own web-based platforms using the same framework.
Embedding Skype into the Live environment for example, is particularly interesting; tying Hotmail, Live Messenger, Office Web Apps or even Internet Explorer in with Skype could open the door to a number of very tantalising prospects like real time, face to face document collaboration, inbrowser video calling etc.
The real deal breaker will come when Microsoft Lync communication suite and its Office business suite add native support for Skype and tighter integration.
Add Xbox Live and Windows Phone to the mix and you potentially have a communication platform that could rival, in breadth, network operators.
Finally, will Microsoft choose to keep Live Messenger and Skype as two separate entities? That is the other six million dollar question that remains on the table as well.