Dell have an Intel-only agreement, meaning that they get their CPU's the cheapest and first, which is really sad, considering the energy and power wasted by the CPU's, as well as the butt-ugly performance.
The day Intel change their desktop lines to Pentium M's is the day they have a real challenge for AMD.
I'm quite disturbed that they're making a 32-bit dual-core mobile CPU though, especially with AMD having the Turion out.