Yes, I'm serious. I just got the computer and there is no button or anything.
Applying pressure to the door does not work either.
There should be an eject key on the keyboard. If you don't have a Apple keyboard, try F12. If you are trying to get it to open at boot time, hold down the mouse button.
If you need to eject it manually (jammed or whatever), flip down the oval outer door (grab it with your fingernail or something), and look for a little rectangular slot at the lower left (on the face of the drive inside, below the sliding tray). You should beable to see a little plastic tab in there that will respond to the old paperclip standby.