Wireless motion sensor camera

I want to make a device that will take a picture of what trips a motion sensor and then send the picture to my email address. this kind of thing being useful at my front door or something. I was wondering which arduino board should i buy and which components should i get and from what source should i buy them from?

Most wireless IP cams have those features.

Check out foscam IP cameras.. full of features and cheap at $80us...