Just created a google custom search engine which can be a useful tool for finding topical, keyword or theme related links and more. See: google cse for directories Inside the engine are about 2000 sites and directories which you can search via keyword, phrase and also use operators like allintitle, allinanchor etc. which makes it useful for finding on topic pages and what sites have 'rankability' within the subset. The engine also includes social media sites like digg, netscape etc so it can also be used to search social media and bookmarking sites. Useful for finding sites that are running hot on a certain topic. It also has refinements for the category of the site ie niche, article, regional etc.. Check it out and let me know what you think