I just finished a project in Blender to train my techniques creating realistic materials. For the raspberrys I combined a SSS shader with mix of glossy and diffuse shader which I combined with a translucent shader. On the raspberry there is also a hair-particle system with a normal white hair shader. The blueberry is a normal diffuse and glossy shader mix with a texture I created with pictures from blueberrys. The background is just a plane with a picture of mountains placed far from the camera to get a defocused background.
Please give me some feedback.
PS: I can provide the blueberry texture if somebody wants it