These acquisitions include Jambool (a social gaming site), Metaweb (a semantic search engine), and Angstro (a social networking startup that pulls data from Facebook, Twitter, LinkedIn, etc).

FORBES: Google To Grab Social Search Share But Stock Is Too Dear

Amid the semantic fervor, however, one big problem looms: So far, neither search engine seems to achieve anything that Google can't.

FORBES: Magazine Article

That doesn't mean that semantic search won't someday offer results that Google doesn't, says Chris Sherman, a search engine analyst and blogger for Search Engine Land.

FORBES: Magazine Article