Facebook FBML is no Longer Valid to create Facebook Pages?

Hello guys,

I just received an email from one of my friend saying that Facebook is going to remove the FBML from 11th March 2011. Is this true? In that case what will happen to the pages that are created on FBML?? And what exactly is iFrame?? Same as FBML? Can we use it just like any other application to customize pages?

I could find that websites like <snip/> seems to be offering iframe tutorials and templates but anybody has got a clear idea on iframes?

Any help would be greatly appreciated. Thanks.