Wordpress.com does not allow the iframe tag, nor do they allow plugins.
For sites that allow the iframe HTML tag
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<base target="_blank" />
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
EMBED CODE GOES HERE
Let's say we save this in an html type document called _nomad.html. ( This name is just an example.)
We then switch to the blogging platform and inserting the iframe statement to the theme, template, etc, for the blog or site. The actual HTML container for the iframe tag will depend on your blogging platform. This can be a plain div tag or a custom tag such as section for Posterous. The iframe invokes the page above.
<iframe width="390" height="480" scrolling="no" marginheight="0" marginwidth="0" frameborder="0" src="LINK TO HOSTED FILE GOES HERE"></iframe>
Save your theme and verify that the Nomad or Headlines widget now appears on your blog.
(1) Be certain that the iframe dimensions are the same that you set in the code.
(2) If you are not able to host a page yourself, you can check with a hosting provider that offer services for free.
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