Comment 2 for bug 271976

On my system (thinkpad R60, Ubuntu 8.0 beta) authentication (at least sudo) via thinkfinger works BUT you have to press enter after swiping your finger (which makes the whole process rather annoying).

relevant lines in my /etc/pam.d/common-auth look like this:
auth sufficient pam_thinkfinger.so
auth [success=1 default=ignore] pam_unix.so try_first_pass nullok_secure