Test server is up and running the latest snapshot. You can get the snapshot from http://mojang.com/2013/01/minecraft-snapshot-13w04a/
Make a backup of your old .jar. Put the new minecraft.jar in your bin folder. Do not update when it prompts you.
The server IP address is:
Please log on and see how the lag is.
If you can’t figure out how to get the snapshot (13w04a) check out this YouTube tutorial:
Thank you, and all participants will get $5 CMC Bucks when it comes out.