Arrgh.  That was it.  ttyS0, not ttys0.  Now at least I get messages at the serial console.
But, I haven't booted successfully again (it did boot once).  And now, I don't get the "bling" indicating the gum has made a bluetooth connection to the laptop. 
It "hangs" right after "Freeing init memory: 64K".  Five times in a row, it hangs at the same place.
Any suggestions?
Thanks for all the great help!
Dave Thomas