Gents,
Why dont you just go straight to the horses mouth?? jeez, that Rubicon directory only contains snippets..
Download this, take a read, have a heart attack about its reccomendations NOT to breath high PPO2 oxygen, due to long term brain damage, and then report back in :-)
http://www.si.edu/dive/pdfs/proceedings_haldane.pdf
This is probably the best read you'll get available at the moment.