which was achieved by adding to my blogger html template:
<script type="text/javascript" src="http://www.figmentengine.com/assets/script/silverlight.js" ></script>
and then each time I want to embed Silverlight in a post, a holder for the control:
<div id="simplekineticsHost" style="text-align: center;"><object data="data:application/x-silverlight-2," type="application/x-silverlight-2"></object></div>
and some javascript to control the silverlight settings:
<script type="text/javascript"> var host = "http://www.figmentengine.com/"; var source = host + "silverlight/kinetics/simplekinetics.xap"; var parentElement = document.getElementById("simplekineticsHost"); var callbackId = "simplekineticsHost2"; var properties = { width: "500", height: "350", version: "2.0.31005.0"}; var events = {}; Silverlight.createObject(source, parentElement, callbackId, properties, events);</script>this was based on this article, with a minor update for the release of silverlight 2.