For those who don't know Intel is changing their numbering system for the mobile desktop line. The T1600 that I was able to use was a 65 nanometer 2.16GHz processor with 2MB of L2 cache and a blisstering 667MHz front side bus with DDR2 533MHz memory. Intel should also have a T1700 processor that will launch at the same time that is running at 2.33GHz with the same FSB and Cache.
Here is a screen shot in Windows of the Intel T1600 in action:

The T1600 Yonah will cost you $637 (£365) when it is first launched. That is the same price as a current Intel Pentium M 780 processor at 2.26GHz with 2MB cache and a 533-MHz bus. Looks like the dual core Pentium M's aren't going to cost more than the current mobile parts.
More to come when I figure it all out!