skype – wow!
so according to skypes blog, the outage which took out skype for about 2 days was caused by a vast majority of their systems rebooting following a windows update/patch cycle.
skype (being a P2P application) has systems in place to “self heal” following an issue with the infrastructure (and to me this means re-route traffic etc.) that being said – when a slew of servers/systems go down at the same time, there are not a lot of new routes to take and therefore bye-bye skype.
skype states they have corrected the code that caused this and also will maintain a better process to protect necessary software/systems updates from effecting the network in this way.