Announcement:
The OWF Server is using Minecraft 1.4.6. Your client needs to be the same version in order to take part in the event on the 12th.
You can find a perfectly legal download of the .jar file here, direct from Mojang: http://assets.minecraft.net/1_4_6/minecraft.jar
(via Minecraft wiki, version history)
E: Oh yeah my part of the adventure should be done in time. I hope people will like it. Also shouldn't someone make an event for the adventure on the OWF calender? I would, but it won't let me create any new events for 2013.