I recently discovered these keyboard shortcuts in JavaFIBS 

Here's the list of keys i now use regularly at the command panel when swtching back and forth between shouts, kibitzing and tells:

ctrl-k  Kibitz
ctrl-t  Tell
ctrl-y  Shout
ctrl-w  Whisper
ctrl-s   Say
ctrl-x   Command

there is no shortcut for Message

traditional Windows shortcuts work as expected with the exception of ctrl-x shich is defined above