Thanks to Interactive Insights Group for this list of search engines that search across multiple social media sites:
Addictomatic searches a wide range of blogs, micro-blogs, news and video. Search results are displayed in your own custom page. While you can’t get an RSS feed of your search, you can bookmark it.
With MonitorThis you can search in 26 different search engine feeds at the same time including blogs, microblogs and more.
Samepoint is a conversation search engine that lets you see what people are talking about. It categorizes Social Mentions, Discussion Points, Bookmarks, Wikis, Network,s B2B Networks, Groups, Life Casting, MicroBlogs, Reviews, Podcasts, Documents, Video, Images, News and Web. There are tabs that let you drill down to results for each category.
- Social Mention
Social Mention is a social media search engine that searches user-generated content such as blogs, comments, bookmarks, events, news, videos, and microblogging services.
WhosTalking is a social media search tool that allows users to search for conversations on multiple social media sites
- Pipes: Social Media Firehose
This is a social media search for tracking brand or product mentions on a slew of social media sites, including flickr, twitter, friendfeed, digg etc.
Scour is a search engine with Google/Yahoo/MSN results and user comments all on one page
- Delver – Search Your World
Delver is a social search engine that enables you to search the information created and referenced by your own social world
- Serph — Track buzz in real time.
Serph is a search engine that you can use to find out what people are saying on the web right now across various sites including: Technorati, Digg, YouTube, Flickr, Google Blog Search, Bloglines, and Newsvine
Search engine that allows you to search various social media sites (delicious, facebook, twitter, etc) by tags