Google has finally decided to match the offer of msn search to offer its user to create its own search engines, using subsets of its huge index.
Under the umbrella of Google Co-op, users can create specialized index(es) defining several hundred thousand(!) websites they want to include.
Why this news is interested from SEO point of view? Because it moves gives SEOs the possibility to leverage the traffic from well positioned keywords, with the traffic from well positioned specialized search sites (using index that conveniently leaves out sites that the SEO is not able to beat in the regular index, or that are spammy and useless for the site’s target audience.