Image Replacement with CSS is possible. What this is is having an image as your headline, with text in the code. This text in the code allows for your site to be crawled and searched. It should be the same text as you're displaying vis CSS. The Fahrner Image Replacement technique initally addressed this solution.
This is an improved way that fixes the critical flaw that would make the content unusable if images are turned off in a graphical browser. It only takes a little additional markup. (approaching tag soup).
I don't use this myself, but see the potential value in this. This does work in Opera 5+, IE, Firebird, Mozilla 1.2, Konqueror 3.1.2, Safari, Camino, OmniWeb, and
IE 5.2/Mac. It fails in IE 5.1.3/Mac OS 9 and iCab. (which I consider to be two of the most worthless browsers out there. Maybe ever).