In the latest version of Omniscope 2.7 we have removed the Yahoo web/news/image search.
These have been replaced with generic Web/News/Image and Video search blocks. When you add one of these blocks you need to select the search service (for example Yahoo or BING). After selecting the appropriate service the configuration options for that service will be displayed.
In the future we plan to add more search blocks (blog search, forum search etc). We also intend to add additional search services, such as YouTube. Please let us know of any other services you think might be useful.