Dingbatt: So far, since I booted from recovery (pwr + vol down), my TF hasn't done another problem reboot (one that hangs). For the recovery boot I didn't select the wipe option, I just let it timeout and do a normal bootup. Will continue to monitor but I accept no responsibility if you try it and lose your data, or brick your TF. My TF just has the stock recovery.
Disregard the above. My TF went into deep sleep and wouldn't wake, necessitating a cold start (long press on the pwr button).
I have sent a support request to ASUS and will wait for the reply, presumably about when the patch is coming out.