Google have just introduced their new customisable search engine. You can now create a highly specialized Custom Search Engine that reflects your knowledge and interests. Place it on your website and, using the AdSense for Search program, make money from the resulting traffic.
You can make the search results only search the websites you specify or the whole web. You can add your own logo and change the colour of the text and much more.
All in all this is an excellent new addition which can help create a search engine dedicated to your expertise and in turn useful to your customers.
You can find it here, see what you think.