The BBC's Dimensions site lets you view a range of phenomena overlaid on different parts of the Earth. What if the moon was sitting on Alice Springs? What do the Pakistan floods look like if placed on England? What would the walls of Beijing look like around London? Much more to explore.
Google launches a site dedicated to the upcoming Australian Federal Election with Youtube channels from each party, electoral boundaries integrated into Google Maps, a search engine to allow you to view what each candidate has said on a range of issues, from immigration to interest rates, news from your electorate, and graphs of media activity on candidates and issues. Australians have been lacking a comprehensive political resource like the UK's The Work For You, and Google has brought it one step closer. Unfortunately, many of the resources are in the form of gadgets you add to your iGoogle homepage, rather than standalone applications.
Google Maps flight simulator. Well, not a simulator so much. But surprisingly good fun. Flash.