Click on the link below to see Cyclingnews's review of the superlight Kuota KOM.  Weighing in at just 875 grams for the Small Frame, it's one of the lightest production frames in the world.

The medium sized bike on test weighed in at a mere 15.6lb and was rated 4.5/5

http://www.cyclingnews.com/tech.php?id=tech/2007/reviews/kuota_kom07