Apple has officially gone ahead and updated its MacBook line with Core 2 Duo processors, offering up to 25% more speed, and increasing battery life with efficiency updates in the new Core 2 Duo chips. This is following the MacBook Pro update, which made that 39% faster, and also gave it longer battery life. The MacBook lineup features 2 white designs, and a black version which, for $200, upgrades the hard drive from 80GB to 120GB.