$ ./bitcoind -daemon=1
Bitcoin server starting
$ ./bitcoind -daemon=1
Bitcoin server starting < ???
$ ./bitcoind -daemon=0
Error: Cannot obtain a lock on data directory /home/gmaxwell/.bitcoin. Bitcoin Core is probably already running.

I assume we're daemonizing early enough to eat the error output... maybe it would be possible to daemonize later? errors like the fact that it's not starting would be useful.