While we’re waiting for the official tools to have this functionality, here’s the uglyslow vershion:
for p in `meteor list | grep '^[a-z]' | awk '{ print $1"@"$2 }'`; do echo "$p"; meteor show "$p" | grep -E '^ [a-z]'; echo; done
This will show the dependencies of all added packages. It parses the output of meteor list and meteor show package@version and will break when anything there changes.