Intel and VIA are already in the ultra mobile PC market and they offer processors with clock speeds of 1GHz and more.
VIA's C7-M and Intel's Core Duo series feature processors which are faster than AMD's current fastest CPU in the sector, the 500MHz Geode LX 800. The sources claim that AMD will replace LX 800 with LX 900, but they did not indicate a timeframe for the launch.
A rough estimation of the UMPC market shows that various vendors have adopted Intel's processors for about 14 UMPC models, and VIA's for 13 models. Since AMD entered the UMPC market towards the end of last year, about four models have adopted its processors.