Yesterday, our division went live with the Community Technology Preview (CTP) release of BizTalk Services. These services extend technologies from our division to work as hosted services accessible via the Internet. In essence, we are creating the first Internet Services Bus to enable developers to create Internet scale composite applications more rapidly. These services are offered for experimentation to the development community to provide feedback and help us plan and determine our future releases.
There are many posts/articles about these services already. Some great ones include: