While Google Base has allowed users to create Adwords ads through their feeds for a bit, Google Base is now promoting this funcationality on the creating your bulk upload page

Google Base wants you to think about your Adwords ad as a set of attributes: ads_enabled, ad_text_line_1, ad_text_line_2, ad_text_line_3, ad_text_visible_url, and max_cpc.

Merchants don’t even have to pick keywords as Google targets the ads automatically. Hmmm. Makes a lot of sense, doesn’t it?

If you decide to go this route, it use as many Google Base defined and custom attributes as possible. The more information you give Google about your products, the more triggers there will be for your Adwords ads.