Regarding infinite obsidian generators....

This is a glitch in minecraft.  Taking advantage of exploits are against the rules on this server.  I do not want to see or hear about using glitches like this in game.

http://minecraft.gamepedia.com/Obsidian#Redstone

According to that link, it is a glitch........

http://www.reddit.com/r/Minecraft/comments/g7g29/first_minecraft_obsidian_generator/c1lhhwj

and there....

I dont want to see it.  Just because mojang isnt in a hurry to fix it, doesnt mean its allowed!