The main page for this idea is Summer Coding 2010 ideas - KDE fingerprint support.
Summary of idea: The aim of this project is to finish fingerprint support for various KDE core components and package it for Fedora. The current code supports KDM login & KDE locking and sits in KDE SVN playground. Support to other KDE componenets have to be done - Polkit KDE auth. agent, kdesu etc. Code should be accepted by upstream and should go through KDE review to be shipped in official KDE SC releases.
Contacts: Jaroslav Reznik <email@example.com>
Mentor(s): Jaroslav Reznik & KDE SIG