It's working on build 238 for me currently.
@Silence - sorry, I thought I was using 186 when I posted that. I since discovered that I was not.
Plugin doesn't appear to be working with the latest build. Just updated both craftbukkit and SimpleHome about an hour ago. the /home and /sethome...
Worked for me.
As has been mentioned multiple times above, this is due to the 1.2 update. You need to wait for bukkit to be updated and then update the server.
Separate names with a comma.