It has been quite some time that I visited my dear search engines. I don't like to earn their wrath. After all, I depend on their good will.
I took a free time to visit Gigablast and I really wanted to read it leisurely.
I learnt from a webmaster that GigaBlast was developed by an ex-programmer from Infoseek, a search engine that I respect. Gigablast supports nested boolean search logic using parenthesis and infix notation. A unique search engine, it indexes over 10 billion web pages.
They have fixed themselves a stiff target of indexing 200 billion pages. I doubt very much whether they achieve that. As of now neither search box nor their directory works.