Radiation is one of those “gonna’ have to worry about it” issues for Space Elevator passengers (and possibily some of the cargo), but one that can, hopefully be dealt with. If I’m in a climber, I would like some sort of positive reinforcement that whatever shielding has been provided is working and that I’m not getting pinged with too much radiation.
The National Space Biomedical Research Institute, in cooperation with faculty and midshipmen from the United States Naval Academy, is developing a portable measuring device for measuring radiation. They’re targeting it for Lunar and Martian missions, but I see no reason why it wouldn’t work on a Space Elevator.
Phil Richter, the Administrative Chair for the Space Engineering and Science Institute, was Dr. David Livingston’s guest on the Space Show this past Tuesday. The podcast for the show is available 
Of special note: discounted Hotel rates are available only until the end of the month for the 2007 Space Exploration Conference to be held in Albuquerque, NM from March 25th through the 28th. The current rates ($70/night I think) for this hotel really are cheap, but they’re only available through February 28th. If you haven’t booked your room yet, now is the time to do so.