I've seen a lot of these top 100 lists, but this one has some real legs to it. Mobile PC magazine has its list of Top 100 Gadgets of All Time, and they really include gadgets dating back before the sextant. Of course, there's a lot of taint toward the more recent technology, but the nod to things such as the original mouse and the Pez dispenser are nice to see.
Top item? The PowerBook 100 from Apple.