or ajaxwhois.com (not quite as fast, but does more than com/net/org for delicious-type names)

or http://domify.com -- it bruteforces the synonyms for you and checks availability

or http://pickydomains.com/ description: If you need a great, memorable, easy to pronounce domain name that EXACTLY describes what your website is all about - you are in the right place. This is what we do. We find available domain names that are descriptive, concise and are easily remembered. And if we can’t find one, or you don’t like any available domain names we suggest – you don’t pay anything. PickyDomains.Com is completely RISK FREE.