Fast retrieval of individual files. Signing of files for security. The slides for the LISA talk are here. If you download rat, please send me email. I will start a mailing list if there is sufficient interest.
Bug reports are always welcome.
Also let me know on which systems you have used rat. The source code for rat is available here. The current version is rat-0.1.1.tar.gz. It fixes memory allocation problems in rat-0.1 that caused a SEGV on some systems. It also fixes a problem with the UID and GID size.