This sounds like a sensible feature for Google or Yahoo, but you need to think about who would really need to search Flash content - as you suggest on your site

This sounds like a sensible feature for Google or Yahoo, but you need to think about who would really need to search Flash content - as you suggest on your site, perhaps the Flash Developer community is your likely audience. So do deals with sites involving that. The point is that very few general users are going to give up on Google results and think "I wonder if what I'm looking for happens to be in a Flash file somewhere". Of course, if it's thrown in for free with Google results then it might be used by general users, but not on its own. And there are plenty of other new directions that people have suggested for your technology. Probably the best to see a return on your investment so far would be to provide precisely the feature that Google have announced to the second tier of search engines.