I just got through playing with the fantastic Mactracker application. Mactracker covers the entire history of the Macintosh from Macintosh, through Mac Portable, the first PowerBooks (drool) and the latest Mac Pro and Intel-based Macs.
As well as full specifications, Mactracker includes beautiful icons, a picture and potted history’s of each model. For me the most special and fun aspect of Mactracker is the startup-chime button which plays the startup-chime for each model. Ahhh, I was able to relive the sound of hearing my old Performa 6100 reboot for the umpteenth time…
Mactracker is freeware but donations are encouraged.
As an additional note, the design and fit and finish of Mactracker are absolutely exceptional. It’s a great lesson in what makes the Mac UI great.
Highly recommended!