A while back I blogged about this site, www.NetFxLive.com . this site is a WF designer that doesn't host the WF designer, it's pure AJAX, etc.
However, somebody sent me this this email illustrating it's possible to add workflow to your blogs. Now, I haven't tried this or validated it works. I haven't even looked inside the main src tag included javascript from the script tag.
I do see there's a few new Activity types - doGoogleSearch, GetTraffic, WorkflowProbe, AjaxRequest/Response...
Add a Workflow to your Blogs
1. Create or import your workflow at http://netfxlive.com and save it.
2. Add the following HTML code to your blogs or to any web page. Specify in Open method your UserName and WorkflowName:
<div id="designerCtrl"></div>
<script src="http://netfxlive.com/includes.ashx" type="text/javascript"/>
<script type="text/javascript">
var designer= new WorkflowDesigner();
designer.Initialize(document.getElementById("designerCtrl"));
designer.Open("ghenadie","Ajax");
</script>
Link to NetFxLive