This metric is debatable, there are duplicated and imported code, the result is different to sloccount and KOffice 2.0 is still in heavy development, but what Ohloh at the moment says about KOffice: it’s worth USD 14,053,618 (256 Person Years) and its activity is still increasing:
Looking at the detailed statistics, I’m somehow still at 11th position. However, I must be careful, this guy is right on my tail 🙂
BTW, for comparisons, KDE itself is “only” $10,750,392, Amarok is $2,405,217, Firefox is $2,173,769 and OpenOffice is at $94,036,902.