The update was announced quietly on the company's online store.
For the same $999 Apple charged for the previous iteration of the white polycarbonate model, users get a 2.13GHz processor (up from 2.0GHz), a 160GB Serial ATA Drive @ 5400 rpm (up from 120GB), and 2GB 800MHz DDR2 SDRAM (up from 2GB 667MHz DDR2 SDRAM).
The update is the second this year to the Cupertino-based company's entry-level notebook offering, the first of which arrived on January 21st when model was updated with NVIDIA's 9400M graphics architecture.
That update also saw the notebook gain the same 2.0GHz Intel Core 2 Duo processor and 1,066MHz front-side bus employed by the mid-range aluminum unibody MacBook, as well as a doubling of its memory to 2GB.
The new white MacBook is eligible for Apple's just-announced Back-to-School promo, which offers a $229 online rebate good for a free 8GB iPod touch to qualifying education individuals who purchase a qualifying Mac and the iPod on the same receipt before September 8th.
As can be seen in the photos below, the new MacBook is already shipping to retailers across the globe: