custom Oracle search engine

Google Co-op is a customisable Google search engine and I just created a personalised, custom search for Oracle that scours AskTom, Jonathan Lewis’ site and www.oracle.com (including TechNet).

This targetted search is useful and will undoubtedly save me time. However, I was unable to get any results from ‘tahiti.oracle.com’ (Oracle documentation set) which is normally my first port of call. Also, I assume Metalink is similarly off limits (account required).