It would be really nice if zabbix_agentd allows to test log based items as well as passive items.
Either by writing values to stdout for one interval only (ignoring 'skip') or by continuously monitoring a file with fixed interval, e.g. 30 sec (maybe only if 'skip' is passed).

Currently people have to wait for:

• server getting configuration changes from database,
• proxy getting configuration changes from server
• agent getting configuration changes from proxy