Here is my list of electronic stuff:
1. Thinkpad T60, AC/DC charger, a very thin ethernet cable, modem cable, a EVDO card.
2. Either Bose QC2 or a Sennheiser PXC-150 headset, spare batteries and adapters.
3. Nikon Coolpix P5000 or S7c camera with a spare battery.
4. Nokia N73 world phone, spare battery and a charger.
5. Sometime a DoCoMo FOMA phone and charger (for Japan trips).
6. Garmin eTrex Venture Cx GPS, USB cable, spare batteries.
7. My BB 8830 for it's contact list etc. It use same USB cable in item 6 for charging. The MicroSD card holds my music.
All the cables and AC adapters go in a single pouch.