Just to let you all know first hand before it gets too popular hehe, I've placed my add on ebay to sell my roof racks with bike attachments (for only one bike). These racks are only about 15 months old as I bought them to transport my bike to and from Sydney-Kiama for last years NSW Big Ride. So,If you're in the Sydney area, and need some racks for your car and bike, you can't go wrong with these.
These racks will only suit a car that has side guttering. The newer cars need to get a different clamp set-up.