Unlimited dial-up in Sydney?

Heya guyz'n'galz,

I'll be in Sydney in a couple of weeks and on my "to-do-first" list,
getting an *unlimited*[1] dial-up[2] connection ranks among the first
two or three. So... any advice on the matter? Reliability is the
keyword here and then price. I'd also prefer to go directly to the
main ISP i.e. Telstra (I may be wrong here, is Telstra your main
telecom company?) instead of XYZ who gets out through Telstra anyway.

Thank you in advance!
Mac

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[1] "unlimited" meaning, well, *really* unlimited (no traffic limits,
no connection time limits etc);
[2] why dial-up? because, from what I've seen, all your ISPs put some
ridiculous limits for ADSL or cable;