When you say text resizes images don’t I think you mean images do?
Admittedly I have never seen any other solution to this other than of course Flash but I really don’t see it as being needed. If you lay out a site on a computer then you are always going to be working at low resolution on browsers. Yes people can increase the font size and yes then the differential between the original text/image and the new text to image is going to be different but I don’t really think that is too much of an issue is it?
If I want to offer larger images then I just link to them using Lightbox. This way I don’t kill the server and people can get to see them larger if they want. I know it’s not quite the same thing but a lot safer in my eyes!! 😊 Imagine 100 of these on a page! 😊
Best wishes,
Mark