If you need to search the tagosphere for a particular tag and you want results from a wide range of services like Flickr, Technorati, YouTube, del.icio.us, Newsvine and Reddit then TagFetch might be the tool for you. The search tool includes results from blog search tools, news sources, photo and video sharing tools and bookmark sharing resources. SiliconBeat compares TagFetch to competitors Gada.be and Wink:
As for competitors, Gada.be seems to focus on the quantity of the sources searched (200 sources), and seeks to help categorize the sources you search (you can search "Amazon", or a more vaguely, a "geeky" category, for example). Wink relies gives you search results that users have bookmarked, and if it can't find anything bookmarked, it backfills with Google results.
More discussion of TagFetch can be found here on del.icio.us and here on Technorati. You can also keep up with TagFetch news on the TagFetch blog.
If you need to search the tagosphere for a particular tag and you want results from a wide range of services like Flickr, Technorati, YouTube, del.icio.us, Newsvine and Reddit then 
