There is a new bloggers guide recently published by Alan Smith. This guide provides a good overview of the next wave of the connected systems technologies.
It starts with the WCF & WF 4.0 and makes its way to the Biztalk 2009, Oslo, Dublin and finally even the Azure (a.k.a BizTalk Services).
Definitely a must-read to keep up to the CS pace. You can find the guide here.