Think Secret claims to have information on the rumored revision to the Mac Mini. According to the site, Apple will replace the existing Core Solo model with the existing 1.66 GHz Core Duo model, and add a 1.83 GHz Core Duo model, effectively eliminating all single-core CPUs from Apple's computer product line.
The new systems are said to be "ready for production." Think Secret believes the models will be introduced in a few weeks time with little fanfare, although not totally under the radar like the last Mac Mini update.