I found another one:
shfs: (Secure) SHell FileSystem Linux kernel module
http://shfs.sourceforge.net/
* file cache for access speedup
* perl and shell code for the remote (server) side
* could preserve uid/gid (root connection)
* number of remote host platforms (Linux, Solaris, Cygwin, ...)
* Linux kernel 2.4.10+ and 2.6
* arbitrary command used for connection (instead of ssh)
* persistent connection (reconnect after ssh dies)