Survey of those people in the Beaverton Linux Reading group running which distribution:
RedHat
7.0: 1
7.1: 7
7.2: 6 (get kernel update, avoid filesystem badness)
Debian
Potato (stable): 0
Woody (testing): 3
SUSE
TurboLinux
Caldera
eDestop 2.2.4: 3