Node Node Explorer V3.5

Product page (via archive.org)
 * Wi-Fi capability is initially noted as 802.11bg, downgraded to 802.11b in later product pages
 * 320x240 TFT QVGA screen
 * Upgradeable SD Card (1GB default, upgradeable to 4GB)
 * Linux based
 * 8 hour battery life, 3 hour recharging cycle

This device is a location-aware media player thing. It seems to have been marketed towards usage as a tour guide device.

Node Explorer Portable GPS Teardown on YouTube
 * AMD Alchemy Au1200 based (AU1200-400MGD, 400MHz) (Alchemy on linux-mips.org)
 * GPS module appears to be a Falcom JP13-S-LP
 * GSC3e/LP (low-power SiRFstarIII) based
 * w/ Sharp LZ9FC22B LCD controller
 * NXP UCB1400BE Audio codec with touch screen controller and power management monitor
 * 2x 2200mAh 3.7V Li-ion batteries (label indicates VARTA Microbattery GmbH manufacture, made in Korea)
 * "LQ035Q7DH03 6Y001206" is on LCD label and is presumably its P/N
 * Manuf. 01/2008

Wireless modules used in this device may differ..

Used in the London Zoo at some point
 * Video on The Gadget Show

.. perhaps the Harbour Trail (w/ the Bristol Ferry Boat Company)
 * Node worked exclusively with Hewlett Packard Research Labs to develop a unique software solution.

... maybe the Brunel Walk (again w/ the Bristol Ferry Boat Company) .... probably some museums (licensed via Antenna Audio)

PDF w/ info for v2 of the Node Explorer