Alex Hornung has made a pile of changes for disk encryption, including adding libdm, a “simple BSD-licensed libdevmapper“,and adding tcplay, a 100% compatible implementation of TrueCrypt.   This should make you very happy if you like running from an encrypted disk.

Update: Alex has written an in-depth explanation of this work.  It’s a huge change!

Update update: Hey, it’s showing on Hacker News too!