Huge Television Commercial Archive

Fulfill your pop culture jones at http://www.televisioncommercials.com/  . This site contains a database of over 30,000 TV commercials, findable in many different ways.

... though let me say that I couldn't get the keyword search to work. I tried it with several different keywords and three different browsers, but I was never able to get search results. (Maybe it's just me. I hope so.) However, there are other ways to find commercials. You may browse by category. You may browse by decade for the 50's, 60's, and 70's. There's also a section for the latest commercials added to the site. 

Commercials are listed with the product and sometimes a tagline (Lays, "Star Wars Promotion"), and a thumbnail of the commercial in question. (Most of the time the thumbnail immediately brought the commercial to mind.) Clicking on the thumbnail brings up the page with the ad (you'll need Windows Media Player to view the commercial itself) and a table of information about the commercial including ad agency, production company, and year. (Not all information is available for all commercials.) 

Posted to Entertainment-Television