Tamron has announced a new version of its popular 18-250 superzoom with an in-built focus motor evidently aimed at users of Nikon's D40 and D40x DSLRs. These two cameras lack legacy lens support in the form of a mechanical focus coupling - an omission widely criticized due to the reduced range of available lenses. Other specs appear to be unchanged from the existing version. Due to go on sale in Japan on December 13th, pricing and worldwide availability are yet to be announced.

Press release:

Tamron announces the launch of the popular AF18-250mm F/3.5-6.3 Di II with built-in motor for Nikon (Model A18N II)

A Compact, Lightweight and Ultimate High Power Zoom Lens Boasting the 13.9X Zoom
Power Designed Exclusively for APS-C Sized Digital SLRs

Mr. Morio Ono, of Tamron Co., Ltd., announced that the company will release the AF18-250mm F/3.5-6.3 Di-II LD Aspherical (IF) Macro, a lightweight, compact and ultra high power zoom lens designed exclusively for digital SLR cameras with APS-C sized image sensors with a built-in motor for Nikon (Model A18N II).

The AF18-250mm F/3.5-6.3 Di-II LD Aspherical (IF) Macro is the ultimate high power zoom lens boasting the world’s greatest zoom ratio* of 13.9X, a milestone that Tamron, the pioneer of high power zoom lenses, has achieved by commanding its technologies to further expand the capabilities of high power zoom lenses.
*As of November, 2007. Based upon Tamron's research of lenses for exclusive use with digital SLRs equipped with APS-C sized image sensors