Ha, I found this one at www.twilightsucks.com, too. I think it might be too big though. Also, EvilOverlord, yours might be too. But I like all the choices.
I like this one best. It's the most succinct version of what this group stands for, I think. Though perhaps a tad large, I think it's the best choice so far.
"Polka will never die!" -- Harry Dresden
"It's more like a big ball of wibbly-wobbly timey-wimey stuff." -- The Doctor
"Mentally unstable like a fox!" -- Rodney McKay
"It's a giant mushroom! Maybe it's friendly!" -- Sokka
"I swear by my pretty floral bonnet, I will end you." -- Mal Reynolds