Boost Power Converters
See also:
http://www.ladyada.net/library/diyboostcalc.html
DIY DC/DC boost converter calculator
http://schmidt-walter.eit.h-da.de/smps_e/aww_smps_e.html
Calculates values for a boost converter and helps you find an inductor.
http://www.daycounter.com/LabBook/BoostConverter/Boost-Converter-Equations.phtml
Boost Switching Converter Design Equations
http://www.joulethief.com/kit.php
Joule Thief Boost Circuit runs an LED off of a single battery. Open source and available as a kit.