The first presenter was from Open Horizon, and the product is called Ambrosia. This is 100% Pure Java middleware that uses the new Java Messaging API to provide publish/subscribe and queuing services. This is not a broadcast product, yet.
Next up was a TIBCO rep, Thomas Joseph. They used TIB to load models into adaptors at runtime (they used reflection for generic interfaces to models). TIB can be used with Java RMI for request/reply style operations (not publish/subscribe); they've written an interface to RMI for the TIB; forms are not supported, however.
John Gafny from Iona spoke next. There is a plan to marry the Java and C++ orbs over the next year. OTM is being developed; this contains the Orbix core with transaction (OTS) and queuing and events and SSL and name services. There is some overlap between Enterprise JavaBeans and CORBA.
Last up was IKinetics talking about their DataBroker product.