try out adsense or yahoo publishing network. G cares if you mix adsense with other contextual text advertising. banners, text link ads, display ads are all fair game.
http://www.johnchow.com/google-updates-adsense-tos/ http://www.johnchow.com/adsense-intellitxt-together-at-last/
Did you mean "does not care"? Being "all fair game" implies that you mean that Google does not care.