In libtricks' fakeroot:
 - su works
 - chroot works
 - dpkg-shlibdeps is _really_ solved, i.e. it doesn't use LD_PRELOAD.
 - configure works. Some packages actually do the build in the
   binary target. And some configure scripts try to find the maximum
   number of envirnoment vars, by running a programme with (first)
   half of the environment vars set. That completely broke the
   old fakeroot, but not the fakeroot from libtricks any more.

In addition to that, you get `example' scripts that show how to use
basic libtricks functionality. 
These scripts actually can be quite usefull:

*trick-chktmp
  If you want to check programmes that open files in /tmp without specifying
  EXCL (a security issue), you can run everything inside `trick-chktmp'.
  For every such open(/tmp/*) call you'll see a message on stderr.

*trick-logopen
  Write log of all open() calls to a file. 
  Can be easily adpoted to only log open() calls for specific 
  directories, using regular experssions.

*trick-chroot
  A chroot for non-root users. (chroot=change-root dir).

But there's a lot more you can do.