Great article! It's nice to see studies being done in this area. It raises many questsions though so hopefully we will see more studies done soon.
Here is another article I read on prayer.
Wired - A prayer before dying
It is about Elisabeth Targ, who conducted a study of prayer on AIDS patients. The study had positive results and was even published in the peer reviewed Western Journal of Medicine. Unfortunately, it was later found that the rigourous testing the study was often heralded for was not so rigourous. The study is no longer taken very seriously or given much credit.
That is not the reason I'm posting it here though. Main reason is because it is a good story and I think all of you LoA buffs will find it interesting.