Clusty Search Engine: Better Than Google?

I use clusty sometimes, but the problem is that it's only useful for a minority of searches in which the meaning of the search term isn't obvious.  Moreso, it depends on other search engines for its results, and I have never really found it useful.

For example, a search for "Java" could mean a programming language, a beverage, or an island called 'Java', but if I search for "java" using clusty the folders I get end up all being related to the programming language.  Now that's not very useful!