We shot an email out to Samsung about today's (11/14) update causing problems for a good many folks, and they let us know we weren't imagining it and that they have halted the OTA for now:
We'll let you know more when we know more.
Samsung is aware of an issue that some Galaxy Tab 10.1 customers have experienced with today's software update. We are working on a resolution and will provide more information shortly. In the interim we have chosen to discontinue availability of the update.
We'll let you know more when we know more.