The current liaison to the Security and Stability Advisory Committee is Patrick Vande Walle .
There is a mailing list for those who are interested in helping Patrick with his work - you can signup to it here.
Further information about the SSAC and Liaison Reports, will be posted here shortly.
SSAC Liaison Reports
In the meantime, At-Large has an IPv4 to IPv6 Migration Working Group which is of course related to the work of the SSAC.
The homepage of the SSAC is: http://www.icann.org/committees/security/