Well... I had the same issue and modified my settings.xml as well. It went fine for several minutes but then this happened:
...
Downloading: https://repository.jboss.org/nexus/content/groups/public//
org/jboss/ws/jbossws-jboss501/3.3.0.GA/jbossws-jboss501-3.3.0.GA.pom
[exec] 4/8K
[exec] 7/8K8/8K8K downloaded (jbossws-jboss501-3.3.0.GA.pom)Downloading: https://repository.jboss.org/nexus/conten
t/groups/public//org/jboss/ws/jbossws-jboss510/3.3.0.GA/jbossws-jboss510-3.3.0.GA.pom
[exec] 4/8K
[exec] 7/8K8/8K8K downloaded (jbossws-jboss510-3.3.0.GA.pom)Downloading: https://repository.jboss.org/nexus/conten
t/groups/public//org/jboss/ws/jbossws-jboss600M3/3.3.0.GA/jbossws-jboss600M3-3.3.0.GA.pom
[exec] 4/8K
[exec] 7/8K8/8K8K downloaded (jbossws-jboss600M3-3.3.0.GA.pom)Downloading: http://repo1.maven.org/maven2/org/jboss
/ejb3/bom/bom-as6/0.1.2/bom-as6-0.1.2.pom
[exec] [INFO] Unable to find resource 'org.jboss.ejb3.bom:bom-as6:pom:0.1.2' in repository central (http://repo1.ma
ven.org/maven2)
[exec] [INFO] ------------------------------------------------------------------------
[exec] [ERROR] BUILD ERROR
[exec] [INFO] ------------------------------------------------------------------------
[exec] [INFO] Error building POM (may not be this project's POM).
[exec]
[exec]
[exec] Project ID: org.jboss.ejb3.bom:bom-as6
[exec]
[exec] Reason: POM 'org.jboss.ejb3.bom:bom-as6' not found in repository: Unable to download the artifact from any r
epository
[exec]
[exec] org.jboss.ejb3.bom:bom-as6:pom:0.1.2
[exec]
[exec] from the specified remote repositories:
[exec] central (http://repo1.maven.org/maven2)
[exec]
[exec] for project org.jboss.ejb3.bom:bom-as6
[exec]
For whatever reason org.jboss.ejb3.bom:bom-as6:pom:0.1.2 insists to be at http://repo1.maven.org/maven2. However it is at https://repository.jboss.org/nexus/content/groups/public/ as the others.
Any idea why this happens? I'm now stuck...
---------------------------
After further investigation I found out that this is a Maven 2 issue. So I installed Maven 3, configured settings.xml again and now it works!