Apologies if this has allready been stated (i got lost in the thread)... but bt is producing something called Rate Adaptive ADSL which is basically ADSL with a box at your end as well. They're using this to access places outside of ADSL coverage (we have two factories being converted into rate adaptive at the moment (i think))
I havnt heard of this in the public domain, and only found out about it through a BT engineer and we contacted their sales department directly - I also dont know how much it costs, but at a guess a lot less then killastream lines...
J