> 1. Are the jars jboss-birt-servlet.jar and jboss-seam-birt.jar in a Maven repository?
No, they aren't.
> 2. When I do in Eclipse ctrl+space inside a b: tag, no attributes are suggested. Can that be fixed?
Yes, it can be fixed.
Could you please create a jira for that issue on https://issues.jboss.org/browse/JBIDE?