Beta3 was posted last night - see http://www.jboss.org/teiid/downloads. This is mostly a fix release. Most importantly it addresses a regression in using socket based JDBC. Next up will be CR1, so be sure to give feedback if any of your issues were addressed in this release.
The Teiid Team
When you have multiple JBoss AS instances installed with Teiid and
clustered, do want use this setup to make Teiid highly available? Then
there are 2 solutions
1) Add the multiple host:port combination in the JDBC connection URL.
See Client Developer's Guide.
2) You can do software based external cluster configuration using
HAProxy, see this blog post http://goo.gl/IPzU1 Thank you Jermy for
pointing this out and writing an excellent article with details.