Tamron announced the lightest 18-200mm f/3.5-6.3 Di II VC zoom lens for Nikon F mount (among 18-200mm interchangeable lenses for APS-C DSLR cameras with image stabilization, weight: 400g/14.1oz):
The price of the new version is $249 and shipping will start on August 20th. Technical specifications, MTF charts and other details can be found over at PhotoRumors.com.