Linked by Thom Holwerda on Wed 15th Aug 2012 11:20 UTC
You'll want to see this. "A teardown chronological history of PDA Organisers spanning 17 years: 1986 Psion II Organiser, 1996 Palm Pilot 5000, 2003 HP iPAQ 5550." Very thorough teardowns of the hardware, detailing all the chips and other on-board parts. Hardware porn, basically. Great work by David L. Jones.