Hey mate, i think i can give you some ideas...
Basically, you need to look at the big composers like Sculthorpe, Hindsen and Edwards. Contemporary Australian music has a large "world music" influence, especially from balinese and eastern instruments. Appropriation is used extensively for new ideas - have a look at Pacem Domine by Ross Edwards, he uses a gregorian chant.
You also need to look at the influence of Aboriginal music on people like Sculthorpe - for one of his pieces, Kakadu, he actually ripped off an aboriginal chant and put it in the string line!
ALso, for people like Hindsen, you need to have a look at the influence of dance and techno on orchestral music. Look at "Rush" and "MPH", you can clearly see the techno influences, even though they are written for strings.
Hope i could help...
- Stan