I've seen the Irish moss at the brew store but never bought any. I figure a tad bit of haziness gives the beer a bit of character.
As far as spewing while the tank is fermenting... hehe, I was sitting here one night listening to mp3's and kept swearing I was hearing a hissing sound. I thought maybe the cat had gotten trapped in the closet, so I opened it up and saw this:
I ran and got a towel to cover things up and everything is fine now.
I've never tried lagering; I don't really have a good place to keep the tank. My fridge is pretty full of regular food so I might have to wait a while on that. Someday I will, though.