I could not get sbcl to work on xen / amd64
i also could not get allegro cl to work on it.
the executable lisp files don't seem to be recognized by the shell

I posted on lisp google groups, without resolution...
http://groups.google.com/group/sbcl-help-archive/browse_thread/thread/f4f4afc0b0a53a61/dfe112364fb67d97%23dfe112364fb67d97
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=802

interestingly this problem happens only with one of my two hosting providers, both using xen, amd64, but slightly different machines.