Here is an image done with the C5 beta, I like that you can use the new polyline,curve tools and draw directly on a polymesh. When drawing your curve on the mesh you just have to place a point before,on and just after the edge that the tube is going around . You will get a tube that hugs the polymesh. This is a lame example but I was just playing around,I think the new vm is going to make greebling alot more interesting.