The objectstore browser, or more generally the tooling framework it's based on, is a swing app. It would be nice if it also functioned as an applet, so we can integrate it with the management console for JBossAS 5. Maciej has already prototyped this, see https://svn.jboss.org/repos/labs/labs/jbosstm/workspace/jhalliday/mm_tooling/ Dust off this work, merge it back to trunk and figure out how best to package it.
Additional considerations include the heuristics resolution work and remote operation (the applet running in a browser that's not on the same host as the AS instance it downloaded from). These may not make it into the AS 5.0 iteration.