Make one! I'd actually prefer King of the Ladder or even Race for Wool as opposed to the paintball arena, but more people would probably be required for any of them.
Do you not find Etho a bit dull on his own? He seems like a nice guy and he's okay in a group but most of the other Mindcrack guys are far more entertaining as solo commentators.
Dunno, I do generally enjoy the group Mindcrack stuff most, but there's something about Etho that just makes him watchable for me. I have watched a few of the others, and some of them are okay, whilst others are just unwatchably dull (as indeed is the case with most Minecraft videos).
I can't remember if I said I'm watching OOG/Legendary at the moment, but I'm struggling through it because of how badly they play, not to mention the constant "I've never seen so many mobs" every time there's more than two zombies. :/
Probably the most depressing thing is that we're both having to watch another group of online friends on YouTube, because none of our "real" online friends want to play with us. :'(
Anyway, yeah, I'll happily go build an arena or two, including a big ladder thing, if there's a chance it'll get used. As you say, they all really need more than two people to work.
I've upgraded Teh Mine.
Tell me if it's working or not!