As rumored, Apple has quietly updated the MacBook to the Santa Rosa architecture with mild speed bumps and the GMA X3100 integrated video.
$1099.00 2.0GHz/1GB RAM/80GB/Combo/GMA X3100
$1299.00 2.2GHz/1GB RAM/120GB/SD-DL/GMA X3100
$1499.00 2.2GHz/1GB RAM/160GB/SD-DL/GMA X3100
Despite comparable clock speeds (2.0 -> 2.0GHz, 2.16 -> 2.2GHz) to the old models, the new MacBooks use the Santa Rosa chipset which boasts a faster 800MHz front side bus over the previous MacBook models. The introduction of the GMA X3100 video card also provides significant benefits over the previous models. The new specs can be seen at the Apple Store.
News source: Mac Rumors