Setup: iMac (from the original five coloured range, it's strawberry). 56kbps internal modem.
The deal: unlimited Internet traffic for an unlimited time, for $30 Aus per month.
The stats: so far, my gf and I have averaged 16Mb a day over the 52 days we've been connected.
For a 56kbps connection, that's not bad =)
I'm contemplating ADSL - just need to check prices and such, and find a job so I can buy the appropriate hardware for it (as far as I know I need something special for it - it's something else to investigate).
At least with ADSL I'll have the PC connected rather than just the Mac. And with the PC connected, the Mac can go through the PC, as can the Acorn.
Now - to modify my program to see how much it would have cost with ADSL for a few of the companies around the place. (I wrote a module Data::FunnelWebInternet::Usage to grab the information - bit of a shite module [it does the bare necessities of the program that used it, and that's it], but it'll be improved as needed. For those wondering, it belongs with that Data::BT module =) ).