Official ASUS Thread - Users with BT/WiFi Fallout Issues - xda-developers
Official ASUS Thread - Serial Number Not Found - xda-developers
Official ASUS Thread - Random Lockups after ICS update
ASUS With Official Support In Our Forums, Promises To Fix Transformer Prime Issues
Official Updates from ASUS -Transformer Prime Issues
Asus promises fix for transformer prime lockups as early as February
Go to the appropriated thread and PM the ASUS Technical Marketing Manager with your serial number and what your issue is. If you don't have any problems at all you can help by letting them know your s/n.
So far the unknown serial number problem was duplicated at Asus and a fix should be coming shortly.
BT/Wifi issues is being investigated and looks like a firmware problem which asus is trying to pin point.
Asus just posted a new thread about random reboots and lockups after ICS update.