Race Day Rush and Sportszone's Photography are places I know of that take pics around the course, but I swear there's way more photographers around and on the course... are there any others that post their pictures online for review?
I don't do race photography as such, but since Buckwallow is my home turf I do spectate the O-cup some years if I don't have other plans on the day.
And I take the camera and make some pics, but not trying to in any way shoot every rider or make coin off of that.
The ones I like make it onto my Picasa Web Albums, linked in my Signature. Here's a few samples..
lots and lots of practice panning. Bikers are easy, rally cars I still am awful at.
Depending on the lens/zoom/situation/lighting, it could be anywhere from 1/40 to 1/160
For each one of those pictures, there are another 500 that come out 90% as nice. That's the hard part, capturing EVERY racer in the perfect shot.