Google custom search engines are a very nice idea.
I have started to create such a custom search engine for Machine Learning research. It is still preliminary, so feel free to suggest URLs or categories to add to it.
Here is the link (Update: I removed the search box from this blog as it did not work, you should use the above link to try it out)

This is a great idea.
I noticed this other similar engine that's already pretty good:
http://www.zunah.com
Posted by: Rajat | December 23, 2006 at 12:30 AM
Doesn't seem to work.
From either the blog or the permanent page, typing "boosting" into the form and clicking search gives the following error page. The "click here" link does the same.
Forbidden
Your client does not have permission to get URL /custom?cx=01696491154[etc] from this server. (Client IP address: [my ip address])
The website you've just visited has tried to provide you with search results from Google. Unfortunately, the site violates our terms of service so your search could not be completed. If you would like to continue with your search, please click the link below, which will take you directly to Google and the results you've requested. We apologize for the inconvenience and encourage you to conduct future searches directly from google.com or through the Google Toolbar, which can be downloaded for free from this address: http://toolbar.google.com.
Click here to continue your search on Google.
Posted by: Ralph Hartley | March 02, 2007 at 04:24 PM
Unfortunately I could not make it work. I thus removed the search box. Please follow the link to do a search.
Olivier.
Posted by: Olivier Bousquet | March 05, 2007 at 04:21 PM
Searchboth.net is the first site to place google and yahoo side by side on one split screen. The web site takes the user's query and creates a browser window with two frames, with the results from Yahoo! on one side and those from google on the other. It has completely end up the hassles involved while searching different search engines at the same time.
Posted by: Searchboth | January 09, 2008 at 07:31 AM
The link also doesn't work. I guess the key or something doesn't work anymore
Posted by: Jilles | April 27, 2008 at 02:42 PM
do you want to using semantic method in your SE? i think you should use it.
Posted by: belajar seo | July 09, 2008 at 11:42 AM