Looking for a best-value "Sports Camera", Water Resistant, Preferably Waterproof?

I shoot Water Polo, so I need a camera with a high shutter speed and rapid/continuous shot (at least 3-4 per second). In Canada, Polo is an indoor sport, so it has to produce a quality picture under artificial light. Lastly, if it could be waterproof (or at minimum, strongly water resistant), that would be ideal.

I'm a coach, shooting this for things like player cards, pictures to sell and marketing. I'm no pro, and don't know much / anything about focal lengths, and definitely don't want to get into changing lenses. I'll be right at pool side, so there is some splash risk. If I could be in the water, that would be even better, but I have a camcorder for that - although it takes pathetic stills.

A buddy got an advance-release-model Sony down in Vegas 4-5 years ago that does a solid job, and it cost him $350 at the time. It does a decent job (especially with the continuous shot), but isn't wonderful under artificial light, and has a tendency to blur.

I'm not looking to make sports photography a career. My day-job is in Graphic Design, so once I have the picture, I can definitely take care of the rest of it. I'm bankrolling the entire club at my expense, so while I understand the passion and desire to accept nothing but the best from Photography Professionals - in this case, all I really need is "good enough to get the job done WELL". We have a 10-year-old Olympus that is good on portraits, but horrible on action (especially indoors), as well as a new GE X5 that has been utterly disappointing.

MUST Have:

Continuous Shot

Water Resistant

Good Indoors

Optical Zoom (the higher, the better, of course)

Fast Shutter Speed / no fuzzy-edges

No changeable lenses