[praptak]

Not really, unless you broaden the definition of a ninja to everyone who does sabotage, for example those who sank the Rainbow Warrior on behalf of the French government: http://en.wikipedia.org/wiki/Sinking_of_the_Rainbow_Warrior

So, sabotage and assasination - yes, but more modern techniques replaced those of ninja.

[hef19898]

For me it's not as much the tools used (since the techniques of seaking around places should still be the same) but the mindset behind. So maybe there's no demand for classical ninjas now. For Ninjas using Ninjutsu skills and modern tools at the same time, I think there is as much demand today as ever (on a international scope, in Japan I can't tell).