Yahoo on Thursday unveiled a new search service designed to index and search content from multiple subscription sites. Yahoo Search Subscriptions beta lets users who are subscribed to fee-based content from a limited number of Yahoo partners, conduct a single search to find both personal subscription and public Web content.Currently the service indexes content from Consumer Reports, Forrester Research, The Financial Times, IEEE, the New England Journal of Medicine, TheStreet.com, and The Wall Street Journal. ACM, Factiva, and Lexis-Nexis will be added in the near future, according to Yahoo.Because fee-based content is typically not indexed by search engines, users are forced to separately visit each subscription site and log on in order to search their subscription, or deep Web, content. Users of Yahoo’s new service still need to have a subscription from each publisher to access the fee-based content. If a user is not logged in to the publisher’s site, when a search result is clicked on the user will be prompted for login information. Otherwise, users can usually navigate directly to the chosen content, according to Yahoo officials. Technology Industry