Last year, libssh was par of a Summer of code project (mercurius).
In that occasion, I moved the sources of libssh 0.11 to berlios.de and began bases for libssh 0.2 and server support.
You may visit the berlios libssh page which hosts the subversion repository or even directly browse the source code.
To compile:
then test with gftp, sftp or some other sftp client and report me bugs :)
To run the Openssh's sftp client on a different port that 22, type
sftp -oPort=4444 user@host