I am actually writing an article on neuroendocrine response... hopefully will finish within the month (I have tonsssss of links studies in pubmed and various journals). Maybe in next months' PMenu.
Here's a few things things I have come across:
1. EPOC fails.
2. GH has a variety of uses both anabolic and catabolic (won't go into details). Recovery, as Mike said, is one good way to think of how GH functions though.
3. Glycogen depletion is key vs. B-oxidation with fat reserves (aka high intensity vs steady state).
I'll leave you guys to your own devices now since I don't want to give everything away.. just yet.
Will be interesting to see what Lyle puts up and if it compares to what I've found so far... not that I need the competition from Lyle of all people. :\
edit: oops couple of errors