The main server dota.barroncraft.com has been updated to 1.3. There are still some bugs remaining, namely a few towers are impossible to destroy. I'm actively working on a fix for the and expect to have it within the next few days.
Update1: This appears to be a bug with Bukkit or Minecraft itself, fixing this might take a bit.
Update2: Towers have been fixed. It's a bit hackish but it works, you can see the code on Github.