Aside from the bookmarklet, which is obviously about people being able to "carry around" the mashificator to whatever site they visit (and which you can customise), there are things that website authors/owners/developers can do, too. This means you can employ it in your website in a couple of different ways, which will give you different options in terms of how it looks and so on.
There's a core PHP script, which is a crude web service you can call over HTTP, but you could also use it directly. The various functions take in some text to analyse and parameters like method (enrich, get collection data, or both), which services to use, and what format to return. Then they spit out what you've asked for, which might be a PHP array, some HTML, or some JSON. You can then call them from other PHP scripts or over HTTP.
You can have the PHP source if you know how to get in touch with me, and then you can call it directly from other PHP scripts. You'll need to add your own API keys, and right now you may not be able to get one for Europeana. It all needs rewriting anyway because my PHP is completely noob, but it's a start!
Here is an example of a page that passes some text straight into an included PHP function.
You can also get back a chunk of HTML, but this suffers from the security constraints I mentioned before so you'd have to run the PHP that served it up on your own server. The HTML snippet you'd get is a list (a set of <li> elements).
For display, the carousel display is the main focus of the scripts at present (which is why I output an HTML list). There's a fair amount you can to to configure the carousel if you so wish, whether you're using the bookmarklet or the iFrame. If you want to use this carousel for your own experiments, the script comes from http://gmarwaha.com/jquery/jcarousellite/. It depends upon jQuery (you'll need those JS files too).