Hi guys, wondered if anyone can help?

I'm off to phillip island for the Moto GP soon and cant wait to get some great stills of the bikes. However I have some questions as I've never shot fast moving anythings before.

What sort of shutter speeds are good for shots of bikes on the track? I realise fast, but how fast?

One shot I'm after is to get the bike with a blured background for the impression of speed. Any tips on achieving this result? I dont have a good computer operating system yet, so it will have to be in camera.

and if anyone knows the track, what are some good locations for shots?

Thanks for anyhelp anyone can give.