Nettles would help. They have a reputation for speeding up compost
activation. If you have any around growing, maybe spread a layer
in between the other stuff and the moss. (Wear long sleeves, long pants,
and gloves, so as not to get stung.) The pine needles will not
decay quickly, but while they are in there, not decayed, they will
provide some additional air space.
http://www.frenchgardening.com/tech....d=309088884143
http://www.mountainroseherbs.com/learn/nettle_leaf.php
One theory (guess) was that it is the carbonic acid in nettles that
helps compost activation. (Formic acid is what is responsible
for the sting when brushing up against nettles.)
Products like this tend to be mostly dried chicken manure:
http://www.scotts.com/smg/goprod/whi...lus/prod70406/