lest anyone think I just typoed 'zsh' or 'ssh', I present zssh, a now ancient application that allows one to use zmodem over ssh http://zssh.sourceforge.net/
@tms I used the hell out of this on production servers circa 2003. my office mate and I caused drama by requesting zmodem bits be put on every server in production.
@sungo
The 1994 me is thrilled to have found this tip.