Yahoo! has launched its oneSearch mobile search service in Europe and Canada.

Making searching for information across a range of category types easier on mobile handsets, oneSearch was previously only available in the US and as part of Yahoo!’s integrated Go 2.0 search application.

The company made the service available via any mobile web browser in March and has now localised it for the UK, France, Germany, Italy, Spain and Canada.

The Go 2.0 application (here’s a tour), which bundles a further range of Yahoo! services in a widget application suite, still does not work on many handsets, however.

oneSearch enhances mobile searching for the small screen by making results more relevant and by giving higher billing to listings and other content types.

Jut like the US version, ads will be placed on European oneSearch results as Yahoo!’s innovations look to steal a march on rivals who may not yet have adapted services for mobile handsets to the same degree.