I thought I remember it being in the recent government paper -- yes it was -- operators will have to make this available by April 2012 (350,000 stops not 8000). THEN
this service will become useful.
That being said, the site that provided the link below, traveline, does apparently contain data for my area, yet it is also incapable of coming up with any sensible bus routes -- in fact even allowing for train it just tells me it's impossible (it's actually 15 min walk +_20 min train + 20 min walks, or a 15 min walk + 20 min bus +8 min bus ride. really not that hard
Of course it's about time one could buy tickets cross companies -- this would open up many more journey options including one direction going virtually from my house direct to the destination, with one of the indirects on the way back -- but since it would involve 2 or 3 companies the cost is 3x as much, making it a silly idea.
No wonder people drive.
Here's a segment of the paperhttp://travelinedata.org.uk/opendata.htm