clipped from: infopirate.org 
Yesterday I noticed, that there is no way to search all social bookmark services at once. "There must be something like a meta search for that", I thought.
Nope, there wasn't. I did a research but I found nothing except some dead links from sites who might have had this service but are offline now.
Google Co-op is a very nice way to set up a custom search engine, and although I like Rollyo and Swiki, Google is still the best: Fast crawling, huge index. And I like the easy way to integrate the co-op search within Drupal.
Easy said, easy done, here we go: My Social Bookmark Search Engine.
If you like/hate my social bookmark search then please drop me a line and spread the word!