Benchmark Reviews posted a technical overview of the VIA Nano CPU

On the 29th of May 2008 VIA announced the Nano CPU, a processor built from Isaiah architecture. Building on the market-leading energy efficiency of their existing VIA C7 processor family, the VIA Nano processor family offers as much as four times the performance within the same power range to extend VIA's performance per watt leadership, while identical pin compatibility with VIA C7 processors will ensure a smooth transition for OEMs and motherboard vendors, and provides them with an easy upgrade path for current system or board designs.

VIA Nano CPU - Codename Isaiah