No you can't embed an iframe into an image, but if you use php or some other means of server generated pages, you can query a lot of the armory info at page load, though I've not looked too heavily into the specific coding to do it. You can also use one of the armory based sig generation sites that will pull the info for you, throw it into an image, and update weekly or so ...
is the site I used, and it looks like this:
But, there's a ton of other sites that do it as well... if you want a more "full" view, you'll likely have to build your own page that references the armory data, or just pull the whole of the armory page into an iframe. If you want a image based border *around* the iframe, you should be able to do that with css, but I don't have time to look up specifics.