As cool at LTFS is, be advised that the Finder is not LTFS "aware" (Storage DNA wrote a nice white paper on this). It wants to write all kinds of filesystem metadata that will often result in failed copies via the Finder. You can use command line tools all day long with no trouble since they do not try to write .DS_Store files or Spotlight databases, but using LTFS with the Finder is as-yet spotty. Perhaps OS X Lion will bring an improvement in the area...
Best,
Andy Richards
VP of Product Development
Keeper Technology
