New feature in Google Maps: embed into html

Google announced a new feature of Google Maps. Go to "My Maps"/"Mijn kaarten" on maps.google.be and click on "Link to this page"/"Link naar deze pagina". Two textfields appear:
Embedding the HTML in the second text box under "HTML in website plakken":

<iframe width="425" height="350" 
   frameborder="no" scrolling="no" marginheight="0" marginwidth="0"

   src="http://maps.google.be/maps/ms?ie=UTF8&hl=nl&msa=0&

        msid=106593127569810234189.000435c68e072f63d1f57&om=1&

        ll=50.916561,4.699123&spn=0.090651,0.05137&

        output=embed&s=AARTsJpF3cBYZmrDjYcLS8foVeBIWCBK5A">
</iframe><br/>
<a href="http://maps.google.be/maps/ms?ie=UTF8&hl=nl&msa=0&

       msid=106593127569810234189.000435c68e072f63d1f57&

       om=1&ll=50.916561,4.699123&spn=0.090651,0.05137&

       source=embed"

    style="color:#0000FF; text-align:left;font-size:small">
   Grotere kaart weergeven

</a>

renders in this blogpost as:

Grotere kaart weergeven
which will show up right on your blog but might leave just a blank spot in your feed reader. Let me know in the comments how it works with your feed reader.
If you click on "Ingesloten kaart aanpassen en voorbeeld ervan weergeven", you get the ability to alter the defaults of the generated HTML:

Basically, it allows to alter the size of the included map. It's a pitty that you can not influence the controls that appear on the map.