Are you sick of seeing ehow and about.com in your Google results? Me too. I made a front end to Google and Bing that lets you use your own personal whitelist, conveniently saved for future use. My whitelists are on the main site via Bing. Yours will be at [yourname].binzap.com .
tldnr; Go to http://binzap.com and never see an about.com site in your search results ever again.
tldnr; Go to http://binzap.com and never see an about.com site in your search results ever again.