At 400, it will take a while.  It also depends on pool luck too, but over time that will average out.  The pool fees are not that much, but there are other pools that have a lower fee structure.  (I use deepbit as my backup pool though).

If you leave it on 24/7, you'll get there eventually, the difficultly has increased greatly this year so that it takes a lot longer to earn even 0.1 BTC.