Source and binaries for LyX 2.4 Beta 2 are now available here: http://ftp.lyx.org/pub/lyx/devel/lyx-2.4/ These are provided for testing purposes only. That said, many of the developers (including me) have been using 2.4 for daily work, without serious problems. But you should expect some bugs, and we'd very much appreciate reports of any you encounter. Riki