As of Saturday, January 19th, 2008, the various UltraTech Mailing Lists (i.e. COMPUTING, ADMIN_MISC, THEOLOGY, etc) are down because of hardware issues. So, if you don't see any mail coming through for those lists, then don't be alarmed. This issue should be rectified by Monday morning.
Normal mail for the ULTRATECH-LLC.COM domain is handled by an Exchange server, and is unaffected by this problem.
Have a great weekend!