While hiking, I always have a watch, compass, and mini-thermometer keychain. I also have a Garmin eTrex GPS unit I use when hiking off-trail (rarely done, so rarely brought). I love the altimeter in my eTrex, and another function which gives you the times for sunrise/sunset right on the dot (adjusted to your current location). Lately I've been looking for something with a clock (doesnt need speedwatch function), compass, thermometer, and altimeter.
I was looking at the Suunto watches, but you have to remove them (for 15 minutes) for an accurate temp reading, so they were out. Then I was looking at the Brunton Sherpa which attatches to your pack with a lanyard, but this has gotten some bad reviews (too bad because it seemed cool). I'm looking for something which will do the job, and preferably remain on my pack rather than my wrist. Any ideas anyone? Oh yeah, I'm trying to keep it relatively lightweight, so no 30lb doppler radar mini-packs...