What is the lightest weight cordless circular saw you can buy?

Next time you are in your local Lowe's or Home Depot, take a look at all the cordless saws they have. If your looking to buy one you will find out there are several companies out there making the saws and they come in all different price ranges. You might find one that is very light weight for say 100 dollars and then you may find another one for 400 dollars. Then again, it will depend on what you think is light weight also.