All things bright and beautiful... All creatures great and small...
"Full Speed FPU - the Nehemiah has a full speed floating point unit for the first time. The Ezra-T has a half-speed FPU. Floating point calculations are used heavily in 3D rendering, multimedia, and streaming applications."

Very detailed review of the new Via Mini-ITX motherboard featuring the 1ghz Nehemiah CPU, at mini-itx.com. There's also a review of a mini-itx (17cm x 17cm) P4 motherboard at hexus.net, which is pretty amazing, because the space needed just for the heatsink looks like it takes up most of the space!