Which disk encryption standard is used in Honeycomb? Does anyone posses an official or un-official information on which encryption standard is used in Honeycomb "encrypt tablet" option? Is there an information on any hacks or backdoors, placed for law enforcement and such? 

Basically, the question is: if someone loses a tablet with confidential information in it, how probable it is, that the data could be extracted from it despite encryption?
The current encryption scheme is outlined on the Android website's "Notes on the implementation of encryption in Android 3.0" page. From that page, the specific algorithm used is noted as such:


  The actual encryption used for the filesystem for first release is 128
  AES with CBC and ESSIV:SHA256


That's the only official documentation I've seen for it at this point, but it is fairly lengthy and informative.