Hi there, I've uploaded a build from the current (r576) version of the yt source. Outside of documentation, this stands a good chance of being branched, tagged and considered 'released.' The GUI now includes support for importing directories containing subdirectories of data, which are then accessible on subsequent runs as well as from the command line. (This is the component known as 'fido' which has languished but is now being brought back.) Additionally, since the last build, a couple bugs were fixed. Please let me know if you have a chance to try it and you find any bugs: http://yt.enzotools.org/files/yt-0.3-dev.dmg.gz -Matt