The Google Voice embed code will not inherently work with WordPress. To get the widget to work, you'll need to first install the Google Voice plug-in.

You can embed images into a default WordPress theme by carefully inserting the HTML "" tag into an area of the main template, header or footer code that does not interfere with the theme's layout ...

Spotify today announced “Play,” a widget that lets you embed songs, albums, and even playlists on any website using simple HTML code.