KDE now uses Qt's printing system; there simply was not enough interest in and manpower to devote to printing systems to keep kdeprint going. it fell by the wayside, and now we work with Qt Software on it, increasing the number of people working on printing substantially.
now that Qt has opened up development fully on gitorious, this becomes quite a bit better of a proposition because we can also get involved more directly with what resources we can manage to find in the community development pool.
he's a community dev who has been doing some work on printing. you may find it interesting. i'd also suggest providing feedback directly to Qt Software about these things as they are a major part of printing support in KDE now.