Saw some impressive benchmarks for the Nehemiah chip/VIA Padlock
technology doing AES:
http://www.logix.cz/michal/devel/padlock/bench.xp

Would it be possible to include support for Padlock in m0n0 ?

There would appear to be support in recent FreeBSD:
http://www.freebsd.org/cgi/getmsg.cgi?fetch=3521146+0+/usr/local/www/db/text/2004/cvs-all/20040815.cvs-all

sai