I wanted to post this after reading the article on cask in Zymurgy as it claimed you shouldn't lay a corney on its side because the O-ring will leak - if it leaks it is worn out and should be replaced. Cask can be dispensed on its side through the "in" poppet with the "out" being used for a breather or to allow displacement with ambient air (I usually tape a coffee filter over it). In April we had 13 cask real ales brewed by 8 homebrewers dispensed in this way either by gravity or through five handpumps...and none leaked. I sent Zymurgy an email about it, but they never responded.