What are some examples of mashups?

Weatherbonk:
http://www.weatherbonk.com/weather/index.jsp
This is a clickable map of the world showing the weather forecasts and web cams. By zooming more information can be obtained. It combines various sites like GoogleMaps, YahooTrafic, NASA and VirtualEarth.

Housingmaps:
http://www.housingmaps.com
This is also a clickable map that allows you to find a house for rent or sale in the area of your choice. Mashup of Craigslist and GoogleMaps

Dude, where is my used car?:
https://www.dudewheresmyusedcar.com
Similar to housing maps, but this allows the user to find a used car. Mashup of eBay and GoogleMaps.

Baebo:
http://baebo.francisshanahan.com
Baebo lets the user search the databases of Amazon, eBay and Yahoo!shopping simultaneously.

BBCNewsMap:
http://www.benedictoneill.com/content/newsmap
This mashup shows where the latest news in the UK is happening. Mashup of BBC and GoogleMaps.

Celebsoup:
http://www.celebsoup.com/
Here you can look up everything you want concerning your favorite celebrity. This mashup looks up books, DVDs and CDs on Amazon, pictures and websites on Yahoo, all sorts of products on ebay and general information on the wikipedia and combines this information on one page.