Yahoo made a number of mobile-related announcements at the 2009 CTIA Wireless show in Las Vegas, including the introduction of Yahoo Mobile application for Apple’s iPhone in eight countries and a preview of the company’s second iPhone application for users in the United States. 

Yahoo sees its array of developing mobile features as vital in its survival against Google, Microsoft and other IT companies exploring the online space. An essential part of that strategy, evidently, is gathering its various mobile assets together within a common application.

Yahoo has been working on extending its various services onto mobile devices for years. 

Yahoo Mobile for the Web is now available on more than 300 handheld devices with HTML-enabled browsers. The application, with the new Yahoo Mobile iPhone app, can be utilized by users in the United States, Canada, the United Kingdom, Germany, France, India, Indonesia and the Philippines; local versions of the program will be launched in coming months, although the company declined to cite exact dates. 

In addition to featuring mobile search and access to online content, Yahoo Mobile for the Web includes access to e-mail and social network accounts, instant messaging, address book and calendar tools. It was originally announced at the Mobile World Congress in February 2009 in Barcelona.

The application is available at this site. 

Yahoo also rolled out its Messenger application for the Apple iPhone, allowing users to send and receive instant messages, exchange photos, add contacts, change their status and stay logged on even when the device itself is in an idle state.

The Messenger application is available for download from Apple’s App Store.