There's a new BTL Home Service that's just been launched. I used to pay Bz$175 or so for 256kbs down but that would have dropped to about $135, I doubled my spped to 512kbs for only an extra $15. Prices are off the top of my head but close(ish). They're currently running ads in the local and national press and have fliers at BTL offices.
I'm sure thats a lot more than in the States, Canada or the UK for a similar service, but then I don't have to live there thankfully, and will happily pay extra for such services that the minority want.