Monitor without superuser?

I would like to create a role "dba_monitor" for a portion of my PG 9.1
user-base to be able to monitor PG but without granting superuser. And I
ran across this:

http://blog.kimiensoftware.com/2011/05/querying-pg_stat_activity-and-insufficient-privilege-291

Specifically, I'd like to enable the dba_monitor users to use PGAdmin III
Server Status tools which requires superuser and I would like this role to
be able write queries like:

SELECT *
FROM pg_locks
LEFT OUTER JOIN pg_class ON (pg_locks.relation = pg_class.oid)
LEFT OUTER JOIN pg_namespace ON (pg_namespace.oid =
pg_class.relnamespace),
pg_stat_activity
WHERE
NOT pg_locks.pid=pg_backend_pid()
AND pg_locks.pid=pg_stat_activity.procpid;

and be able to read all the contents, including the "current_query" which,
it appears, requires superuser.

Is this achievable? Any way around this?

Cheers,

Jan