My benq, lg, and 2 nec's on the motherboard ide connector. My three liteons and my boot drive are on an sil 680 card. My yamaha is on a promise ide controller (doesn't like dvd burners). Another hdd on motherboards sata controller and my last hdd on motherboard terciary controller (also doesn't like opticals).
Also, I have absolutly no room in my case (Coolermaster CM-Stacker) for any other opticals, only a hdd. SO I wa thinking of going the usb route (I know, I wish I could have it internal) because then I can add 6 more drives easily.