It's been quite a while coming, and its not quite ready for consumer use just now, but the DesignScript Studio hybrid programming environment is now public! Folks at CAADRIA andICSE/Live were the first to see live demos. Below is a program being written
[Everything you see here is potentially subject to change before its first downloadable version which we're expecting to distribute this summer]
It's designed as a mixed visual and textual programming environment, allowing free and flexible interchange between things that are code, things that are node-arc diagrams, and things that are free-form UI. It has a fully live virtual machine allowing it run the program whilst it's being edited.
I've been waiting for this day for a long time :)
Stay tuned, more information coming soon.