Hehe, the zombie infection thing isn't part of the vanilla event, so I'll save it and do it when wrath releases.
I have updated the main post, Eastern Plaguelands and Winterspring are under attack!
If you check out the Scourge Invasion page you'll see I have also added positions and timers of the currently spawned node. Eastern Plaguelands nodes are in a 5 hours cooldown, Winterspring nodes are in a 4 hours cooldown. Once active, the shards remain there for 1 hour then eventually disappear. The rares supposed to spawn at shards show up 15 minutes after they're up, and disappear 15 minutes after
Sorry for the late update, got caught up doing other stuff last week so couldn't implement the web backend till the weekend, despite the fact the zone invasions have been out for a bit already,
Gave some visual polish to the page as well!