I signed my dad up to TPG for his home and his office, thus far they seem to be pretty good, fast connection. They lack unmetered content, but make up for it with unmetered uploads and high download quotas. Their tech support is pretty good too but I called them a couple of times and they were closed.

My favourite ISP is Intenode, they're a little more expensive because they've kept their main focus on providing internet, rather than forcing landline / mobile phone packages down people's throats. Also, on most plans they don't meter uploads.

Also their unmetered content is great:
* HUGE FTP file mirror with tons of open source and Linux / BSD / Solaris distros
* MajorGeeks mirror
* SourceForge mirror
* Steam mirrors
* ABC IVIEW
* They repeat stacks of streaming radio streams
* TiVO update / content mirrors
* Games.on.net - game servers, file downloads, media downloads

Also, their tech support is really good, all of it seems to be based in Australia, so easy to communicate with.

The problem is that people on Telstra Bigpond pay top dollar for an internet connection with a fairly low download allowance (in the order of 10GB per month), using this mirror means they can download a multi gigabyte Linux distro without subtracting from their pitifully low download allowance. These days they slow your internet speed when you exceed your allowance, but at one stage they used to change 17c per MB once you reached your allowance (counting both uploads and downloads) and unsuspecting people ended up with internet bills worth thousands.

Back in 2004 the Bigpond file mirror used to be a good service (I used it a lot while at work) but recently I tried it use it and noticed that it wasn't very well maintained anymore, of course they should have gone the other way and fixed the service.