"ICS is referring to Ice cream sandwich (Android 4.0) and FOTA is a notification from your tablet that will prompt you for the update via WiFi. TF101 will be getting Icre cream sandwich update on 12 Jan as well. Thanks."
"TF101 will be getting the update to ICS on 12 Jan 2012 via FOTA as well. Thanks."
Source: ASUS Singapore