Full binary releases for both Linux (RedHat 7.1 tested) and Windoze are up. See the links on hoverball.sf.net. Coming soon - a new release which enables much smarter robots and fixes a variety of minor bugs
In September, Sourceforge discontinued its FTP services. I finally got a few spare moments over the holiday to partially restore the missing archives as package releases - see hoverball.sourceforge.net for the links.
Executables of Hoverball B.0.1 are available for HP-UX, Linux, and Win32; see the http://hoverball.sourceforge.net home page for details.