Q: My macbook is stolen, what can I do to track it's use?

Hi,

My brand new macbook pro 15'' got stolen last weekend. It is password protected, but I would very much like two things to happen:

a) track if the macbook gets online somewhere and report this to the police

b) wipe the content remotely, although I made no special arrangements for this upfront.

Is there anything I can do, or should I have made arrangements for things like this when it was still in my possesion?

Thanks much,

~ Stephan