Toshiba has unveiled two new models in its Libretto sub-notebook line, but doesn't have any plans as yet to release them to a drooling UK public.

Both are based on an 800MHz version of the TM5800 Crusoe processor from Transmeta, have a 10in widescreen TFT LCD display capable of 1,280x600 resolution, 256MB of main memory, a 20GB hard disk drive, an ATI Mobility Radeon M graphics card, an Ethernet port and a slot for a Secure Digital (SD) memory card.

The major difference from previous models comes in the form of an internal wireless LAN adapter in the L5/080 TNKW model, and the inclusion of Windows XP Professional operating system. Older versions had no wireless support and ran Windows 2000 or Me. The previous model also used a slower 600MHz Crusoe processor.

The new Libretto models have a battery life of 4.5 hours on the standard battery, said the company.

Toshiba's launch comes a week after Sony announced its new Vaio C1 and Vaio U1 sub-notebook computers. The Vaio C1 comes closest to the Libretto in terms of looks but runs a slightly faster 867MHz version of the same Crusoe processor and has a smaller 8.9in widescreen LCD that manages the same resolution.

The new Toshiba machine weighs 1.1kg and measures 27x17x2cm. In contrast, the Sony Vaio C1 comes in just a touch under 1kg and is smaller.

While the Sony machine may win on size and weight, users will probably appreciate the Toshiba's larger keyboard.

The new machines will go on sale in Japan on Friday and the wireless model will sell for around £907. Toshiba has no plans to put the Libretto computers on sale overseas at present, so put those email petitions together now.