On that score, picking dung from a field is pretty cool. Except your girlfriend bitches about it for a long time.

Just a comment on casing with compost or manure. Remember casings don't supply nutrition which compost or manure obviously does. I think it is really just spawning compost and not using a casing. I know it's pretty trivial, but I think spawning would be a more correct term, even if the compost is layed out in a similar manner to a casing. On a related note, I think that mixing the spawn with the compost would allow quicker colonization of larger amounts of compost than laying it out like a casing would.
my .02
peaces

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-From a registered Mad Scientist

"From a certain point of view"
-Jedi Master Obiwan Kenobi (also a Mad Scientist tm)

I use liquid-> cow manure as my standard technique.