I have been told that the iframe issue is due to security issues but I agree that really would like to have iFrame, at least with some whitelisting option or something.
Goggle maps use iFrame and it's possible to use the code if you do the following:
Remove everything after </iframe>
Replace <iframe> and </iframe> with <object> and </object>
Add <p> before and </p> after
Replace src with type="text/html" data
This tips from Steinar Hov:
webfronter.com/videoer/sarepta/menu3/Sm_..._inn_GoogleMaps.html