Increase your metasm-fu -- @0vercl0k

Basics:
http://code.google.com/p/metasm/source/browse/README
http://code.google.com/p/metasm/source/browse/samples/

Debugging:
http://www.time0ut.org/blog/reverse/metasm-for-fun/

Automatic Exploitation stuff:
http://esec-lab.sogeti.com/dotclear/index.php?post/2010/07/09/88-exploitation-de-format-string-avec-metasm
http://esec-lab.sogeti.com/dotclear/index.php?post/2010/06/19/85-automatic-exploitation-with-metasm
http://esec-lab.sogeti.com/dotclear/index.php?post/2010/06/14/84-exploitation-automatique-avec-metasm

x64 Emulation:
http://esec-lab.sogeti.com/dotclear/index.php?post/2011/02/16/x64-spoon

Processor In Metasm:
http://esec-lab.sogeti.com/dotclear/index.php?post/2009/10/02/71-how-to-implement-a-new-process-in-metasm

Binary Tracing:
http://esec-lab.sogeti.com/dotclear/index.php?post/2010/07/19/90-metasm-howto-bintrace
( source here: http://esec-lab.sogeti.com/dotclear/public/blog/metasm/bintrace.zip )

Talks:
check talks/ :)