Links
To download HandBrake:
 
http://handbrake.fr/?article=download
 
For more information about specific file formats or features:
 
http://handbrake.fr/?article=details
 
 
Tutorials:
 
http://trac.handbrake.fr/wiki/HandBrakeGuide
 
 
(All screenshots courtesy of HandBrake and morguefile)