About a year ago, I installed Traces of the Past on my iPhone. It is (or was) an application that searches hundreds of millions of freely available historical records from countries all over the world. I wrote about it at the time at http://blog.eogn.com/eastmans_online_genealogy/2010/05/traces-of-the-past-for-iphone.html
Now Traces of the Past has been discontinued, according to an announcement from producing company Truscape Solutions. Quoting from the company's web site at http://www.tracesofthepast.com/:
We regret to announce that support for Traces of the Past has been discontinued. Understandably, this will come as a disappointment to many of our users. Many factors contributed to this decision, but first and foremost was our concern about being able to adequately support the App at a time when the service we access for records is undergoing significant and ongoing changes.
The current version of Traces will continue to work as long as the service it uses remains available. Unfortunately, that service will soon be discontinued as the provider moves to create a better and more robust service for accessing their records.