From the school of "one less device" comes a GPS-enabled mobile camera phone. Sign up at www.nextel.com ($10
a month) and download a dozen or so map or aerial-photo "tiles" from Trimble Outdoorscovering your intended travel areaonto a compatible Motorola phone. I followed my position on a hilly ramble, even when cell reception conked, and the built-in 0.3-megapixel camera locked in my lat/long coordinates whenever I snapped a pic. Back home, I wirelessly pinged Trimble's server and then viewed clickable thumbnails of my hike on the PC mapping software. Cool stuff, though you can't scale maps on the phone.
Specs:>> Weight: 4.8 ounces >> Screen: 1.75 x 1.5 inches, 262,000 colors >> Battery life with backlight off: 10 hours