AMD Athlon II Neo K125
The AMD Athlon II Neo K125 Processor is an entry level single core CPU for small laptops. It has an integrated DDR3-1066 memory controller and supports HyperTransport 3.0 with 2000 MHz.
The performance is similar to a 1.7 GHz Pentium M / Core Solo and therefore faster than 1.6 Ghz clocked Atom CPUs in Intel based netbooks.
From: Notebook Check
Not sure what you will be doing but the Asus Eee PC 1215B is roughly the same price --- less CPU performance but better graphics.
And even better ... for less than additional $50 you may load up a dual-core E350 Zacate.