I had a problem with the Premiership iFrame because I use a dark Skin and a lot of the Fanatasy league background was transparent, so I added this to the iFrame to sort it out.
HTML Code:
<div style="background-color:white;width:98%"><iframe src ="http://m.fantasy.premierleague.com/" width="98%" height="410">
<p>Your browser does not support iframes.</p>
</iframe>
</div>
And here's another idea for an iFrame.
http://m.facebook.com/