I just created a new plugin that you might be interested in as your into ALL THINGS FAST!
Easy iFrame Loader
Easy iFrame Loader is a shortcode/widget/template tag based widget that loads iFrames after the page load has been completed by using windows.onload to insert the iFrame code into the HTML
This means that you never get stuck waiting for a page load because of an external iframe. This was a problem I was facing on one of my own sites that uses W3 Total Cache where it was waiting for Vimeo to show the video. Nothing wrong with W3 Total Cache, just Vimeo taking it's time. Here is the site http://share-and-follow.com
All the best