Rojo has launched a blog search service earlier in the month of May.
Quote from Rojo blog post – “Now you can search millions of blog posts and news articles with Rojo! Rojo Search uses Rojo Relevance so search results are sorted by how often they are read, tagged, and mojo'd by you, your friends, and the Rojo community. And it’s social; "mojo" votes influence relevance and votes from your friends count more! Once you find what you are looking for, you can tag it, flag it, email it, or give it some mojo”.
Try it and let us know what you think in our forums.
Michael Arrington – Rojo takes a stab at solving the blog search relevance problem (which I discussed in the last paragraph of this post). Results are ranked according to freshness, total subscribers to the underlying feed, total “mojo” votes (a Digg-like feature - see here for a description), whether people have tagged the story (a sign that they liked it) and total number of times the post was read. This is an algorithm approach to relevance, similar to what Sphere and Bloglines have done (although with very different data points). And it seems to work - relevance is very good.