The Flickr API is great to play with. SkipDistance.com was another Flickr-based game where an English saying is portrayed using Flickr images. The objective of the game is to guess what English saying is actually being displayed.
There's a new saying every week.
In December 2005, this website was replaced by a budget airline search engine where you could filter available airlines on the country you're flying from and the country you're flying to.
This site, in turn, was discontinued in January 2008. If you're looking for a similar service (with more money and time on their hands), check out AirNinja.com.