Hi,
I just installed a fresh copy of eclipse "helios" and then installed m2e, m2eclipse-wtp, "JBoss Maven Seam Integration" and JBossAS Tools (in that order), all from the links snjezana posted. Result: Same problem as before: The xxxx-ear project can't be built with maven (missing dependency on the "war"-packaged project "xxxx", which has a declared packaging "ear"). Also, the application.xml in the target folder of project xxxx has no modules listed (might be a consequence of the other problem).