With the introduction of the Apple MacBook, one of the new features offered to end users is the ability for users to replace the internal hard drive. Typically, Apple laptop hard drive replacement has required the involvement authorized technician in the past.
Both the MacBook's RAM and Hard Drive are accessible through a panel under the battery and the process has been detailed in this Video from MacWorld.
MacWorld also provides the first benchmarks of the new MacBook, comparing it to the G4 iBooks it replaces as well as the current MacBook Pro and iMac.