(Posted to "beta" forumn, even though this is an official FreeOTFE release. AIUI this is where John Haller wants these posts?!)
FWIW, FreeOTFE v5.20 and FreeOTFE Explorer v3.50 have now been released, which add support for Linux keyfiles, Greek and Croation language translations, and a few other improvements.
The summary of the main differences between FreeOTFE and FreeOTFE Explorer can be found at: http://www.FreeOTFE.org/main_explorer_differences.html
Both can be downloaded from: http://www.FreeOTFE.org/download.html