Please take the following news item with a grain of salt until we can receive official confirmation or denial from Intel.
While we've heard a good deal about the first generation of Intel's Atom family CPUs, dubbed the 200 series, many have been wondering when or if a dual-core Atom is coming. Rumors suggest that there are indeed coming:
“...a new 300 series would also see the first dual-core Atoms with a 1.87GHz, Atom 300 processor. The upgrade could handle as many as four instruction threads at once through the use of Intel's HyperThreading, which can run more than one stream of instructions on a processor at once and prevent chips from idling unnecessarily during heavy work.”