Teiid 8.6 Alpha1 has been posted - http://www.jboss.org/teiid/downloads
This includes the initial Cassandra connectivity provided by community member Radek Koubský, OSGI compatibility for Teiid embedded, and several important fixes. Temporarily the embedded kit is broken as the resource adapter jars are being built incorrectly. As the documentation and a few other features are rounded out we'll have a bigger pre-release posting about Alpha2.
The Teiid Team