There's a long thread currently going on on core-devel about scripting within KDE.
Here's the executive summary:
To qualify the first comment, even if your language of choice isn't the one taken, there's nothing lost. Currently all scripting languages are second class citizens in the KDE world. Promoting one to first-class status doesn't demote the others significantly. An "everybody wins, use what you want" solution really is just a way of rephrasing the current situation.
I've started a poll to see if it might turn up a clearly prefered language. I'm not sure if anything will come of it, but I'd encourage folks to drop their opinion in just to see where it leads.