Will GTK be used in Openmoko?

[Edward Falk]

I really liked using GTK to develop -- it meant I could write my code on 
a workstation with the intent of porting it to Moko later, and also with 
the possibility of writing a workstation version of the same app.

So what are supposed to program in now?  Is GTK actually going away? 
Whatever I switch to, will it run on other platforms (like Linux), or is 
it proprietary?