Here are a few useful low volume mailing list for those involved in Government web services in WA and Australia in general.
OSIG the Online Service Interest Group, a Western Australian list mainly used to distribute job listings in the State Government sector, however, things may change in the next wek or so once a forum is launched:
AGIMO, the Australian Government Information Management Office have a number of specialist mailing lists (all low volume).
Intranet Peers, run by James Robertson of Step Two Design requires a Yahoo login and a public-sector (.gov or .ed) or non-profit organisations email address to join. If you are involved in intranets, it is worthwhile for just the resources alone, which include screen shots of over 40 government intranets.