Flyball is often called an "extreme" sport. Fast paced, adrenaline rush of a game. Eight dogs, Eight handlers and everyone is excited. Sometimes stuff happens. Most of the time it's minor scrapes and unintended bites... a team can go years with nothing more major than that... sometimes though, it's more serious. I think it's a prudent thing to have a good first aid kit for the team for both human and canine injuries. You can't plan for everything, but you can be prepared for many "flyball type" situations.
So what should be in your kit? If you have one, what is in it that works well for you?

Here are some things in ours:
Rimadyl - canine pain relief
Tylenol - humans only (never ever give to a canine)
instant cold pack - for bumps, bruises and twisted ankles
"Go Dog" - a rehydration solution
or bottle of pedilyte - no flavor
or canned chicken broth low sodium - for dehydrated dogs if they won't do pedilyte or "Go Dog"
Honey - for a more serious hypoglycemic state
assortment of bandaids, bandages, blood absorption gauze - for scrapes and unintended bites
bandage tape
Bandage removal sissors (have the blunted end)
spray antiseptic
hydrogen peroxide
Antibiotic Ointment
Alcohol prep pads
Assortment of surgical gloves - to protect you from another's blood
Itch relief packets - Benadyrl
"Bitter Aide"
flour (to stop a nail from bleeding)
Crazy glue
Dog nail clippers
T-shirt to put on bandaged dog - packs easier than a cone
Coban/Vet Wrap Assortment of widths
Rectal Thermometer - canine
Skin Stapler and cartridges (If you have someone that knows how to use it)

Great list, I had just recently been reminded about the honey.
Also, keep the peroxide fresh, we were once stymied trying to induce vomiting with hydrogen peroxide that was not fresh enough, and it didn't work.

I also keep a bottle of Fish-Mox in my bag. This way I can start an anti-biotic regimen immediately for flesh wounds/punctures.
I started this after reading this: http://www.terrierman.com/antibiotics.htm

That's a great list. We try to not keep any food-type products in our bag after some doggies decided to go fishing one time.

I think the only thing that you didn't mention that we have is lanocaine (sp?) the topical numbing spray. Sometimes you just got to get that handler back out there.

Madcowdog - I love Terrierman's stuff.

That's a good list. I would add:
Kwik-stop-type styptic powder (instead of the flour)
Flagyl
Saline solution