phranque - 3:30 am on Jan 23, 2009 (gmt 0)
i think there will be more use of and utility in vertically oriented search (if that's the correct term), such as linkedin for example.
the trick will be finding the optimal search engine for that type of content.
there is some interesting research recently published on this subject as reported in this current Webmaster General thread:
Search Engine Research [webmasterworld.com]