At the last Gartner BPM Summit I gave an overview presentation on BPMN, XPDL, BPEL, and Wf-XML. Due to the positive response from the presentation, I was asked to record it so it could be accessed from the web. This is available and can be accessed by clicking on the link below. There are a few slides from my employer up front, please understand they support all my time and effort to make this information available to everyone for free, so after a few slides on the Fujitsu Interstage product, you will get to a fairly succinct overview of these four important standards.
It runs about 30 minutes total. Enjoy.
Thinking Matters 
Keith,
The link to your presentation on BPM Standards seems to be broken. Is this the same presentation that is available at:
http://www.fujitsu.com/global/services/software/interstage/events/BPMStandards_viewlet_swf.html
Your link seems to be broken. Can u send me the swf? Thanks in advance
updated the link *again*