Mine

Missing:
----------
1) org.apache.activemq:activemq-core:jar:4.1-incubator-SNAPSHOT

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=org.apache.activemq -DartifactId=activemq-core \
          -Dversion=4.1-incubator-20060831.071006-30 -Dpackaging=jar -Dfile=/path/to/file

  Path to dependency: 
        1) org.apache.servicemix:servicemix-components:jar:3.1-incubating-SNAPSHOT
        2) org.apache.servicemix:servicemix-core:jar:3.1-incubating-SNAPSHOT
        3) org.apache.activemq:activemq-core:jar:4.1-incubator-20060831.071006-30

----------
1 required artifact is missing.

for artifact: 
  org.apache.servicemix:servicemix-components:jar:3.1-incubating-SNAPSHOT

from the specified remote repositories:
  central (http://www.ibiblio.org/maven2),
  servicemix-m2-repo (http://servicemix.org/m2-repo),
  apache.snapshots (http://svn.apache.org/maven-snapshot-repository),
  apache-snapshots (http://people.apache.org/repo/m2-snapshot-repository),
  codehaus-snapshots (http://snapshots.repository.codehaus.org),
  apache-releases (http://people.apache.org/repo/m2-ibiblio-rsync-repository)