Hi Ash - probably the best place for current comet news is here (click "South" link at top to get visibility from southern latitudes):
http://www.aerith.net/comet/weekly/current.html
Comet ephemerides are available here:
http://www.minorplanetcenter.net/iau...ets/index.html
Skyhound has finder charts for some of the brighter comets here:
http://cometchasing.skyhound.com/
Cheers -