SSH proxy or gateway?

[C. Regis Wilson]

I'm wondering if there is a proxy version for SSH, but not
in the usual way that some people have attempted.  I was
thinking of:

user <-via clear-> telnet/SSH proxy <-via SSH-> server

This requires no changes to client, except that the
client needs to know to telnet to the SSH proxy and
open a connection outward from there, similar to FWTK
telnet proxy (which is a great proxy!)  The other
alternative, which I'm using now is:

user <-via SSH-> dumb plug/filter <-via SSH-> server

Not nice.  Any thoughts, comments?  One way to do
this (which I saw in the archives, and may be more
widely applicable):

user <-via SSH-> Server Proxy
                 Client Proxy <-via SSH-> server

I don't need this because connections on the inside don't
need to be authenticated.  But, even this option is not
ready yet (I believe)?

Any help?  Thanks!