I'm a big fan of satellite imagery. I love Worldwind, Terraserver and Google Maps - I can just imagine so many applications to use the data they present so effectively. Anyway, until recently Australian coverage was poo but Google Maps has began rectifying that situation. Yay!
Here's lookin' at you Australia, using Google Maps
Local search is still poor and coverage patchy (no high detail images east of the Telstra dome in Melbourne and the Sydney Harbour bridge and Opera house are also low-res only though the city is pretty well covered) but it's a start. Keep up the good work Google!