[IP] From the principal architect -- Skype / NSA - Dave Farber - com.listbox.v2.ip - MarkMail

From a snapshot of Skype amid "PC plus" transition

"How do we solve that for our users? Servers. Lots of them, and more and
more often in the Windows Azure cloud infrastructure. In the case of
instant messaging, we have merged the Skype and Windows Messenger message
delivery backend services, and this now gets you delivery of messages even
when the recipient is offline, and other nice features like spam filtering
and malicious URL removal. For calling, we have the dedicated supernodes
already, and additional services to help calls succeed when the receiving
client is asleep and needs a push notification to wake up. And over time
you will see more and more services move to the Skype cloud, offloading
memory and CPU requirements from the mobile devices everyone wants to enjoy
to their fullest and with maximum battery life."

[IP] From the principal architect -- Skype / NSA - Dave Farber - com.listbox.v2.ip - MarkMail