> Try this:
> * * * * * touch ~/foo
> 
> If that works, you should get a foo file in your home directory and
> your script is the problem.
> 
> If it doesn't work, make sure cron is running and that /var/cron/allow
> is being read.  (you might need to restart/HUP cron)

Thanks.  I could have sworn it was one of the first things I checked, 
but cron was indeed not running.  Everything's happy now.