Probably not for a while, if they have it their way.
Reducing prices will just lead to more users (*horror*). They can't keep up with the current demand (50 000 application backlog) and they're not about to hire more staff, so why add to that?
The only prices they reduced last August were for the 'higher' level ADSL speeds (384, 512 & 1mbps). They didn't cut their entry level 192 price at all (they just moved it up to a higher speed by merging it with the 384 category). The minimum cost for someone wanting some sort of ADSL connection hasn't gone down since March 2005...