Slide decks are available from the Architect Insight Conference 2008 held in the UK at the end of April. These talks are fluffier than ones that I normally point to and since you only have the slides and not the audio, I recommend picking a few based on their titles and trying them out quickly to see if you find something interesting.
Here are two that I thought looked interesting.
Building an Enterprise Service Bus with BizTalk Server 2006 & WCF
Standardising SOA
You can access all of the content from the post event resources.