It would be nice to see Skype integrated into XBOX Live. We might be seeing that experience grow in value, keeping more eyes in the network by building out their interactive communications feature set.
If I remember correctly from the Kirkpatricks Facebook Effect, there is a lot of ego play in those acquisitions. Although I need to say, that it would take a lot of ego out of me to shell out 8.5b :)
Marcin / http://linkfindr.com