The Vietnamese site Tinhte who posted last weeks second iPhone HD leak have posted images and a video (below) of an unreleased MacBook.
The MacBook packs a 2.4GHz processor, LED backlit display and NVIDIA 320M graphics and is presumably due for release in the coming weeks, possibly alongside the rumoured MacBook Air update.
The MacBook was last refreshed in October of 2009 with the addition of 7-hour battery life and a mulit-touch glass trackpad.
Last week it was rumoured that the MacBook Air would see an update, although the timeframe of that rumour has passed it is likely to occur within two weeks.