I'm an EMT (Emergency Meedical Technician; we have very few Paramedics in my state.) I ride a bike. I'm a biking EMT!
Unfortunately, I usually don't carry many medical suppliews on my bike.
However, you can find many articles like this one:
http://news.bbc.co.uk/hi/english/hea...000/831826.stm
And for a while I was subscribed to a email list for bicycle medics.
They're great for large crowds where an ambulance would have trouble getting through quickly.