Did you overwrite MacOSX?
what happens when you hold down option at start up? you get icons with the choice for booting into a windows partion, at least?
if you have a wired, usb mouse, you can try holding the left mouse button on reboot to eject disks. Alternatively, hold down the eject key (or f12 if you don't have an eject key) during reboot.
for all of these, press the buttons right after you hear the startup chime.
Hi Xidious,
If you're worried that you have accidentally overwritten your MacOSX partition, you might be in trouble. You may need to re-install MacOSX as Malcolm mentioned. You say you are new to the Mac, does this mean that you have only just started using your Mac? Hopefully this means you don't have a large amount of personal data to lose...
First, you need to confirm if you have destroyed your MacOSX partition or not. The easiest way of doing this is to follow bluskale's advice, reboot and immediately after hearing the boot chime, hold down (just) the Alt key. The Mac should temporarily display some partition startup choices, usually the first one listed would be MacOSX, then Windows (your Boot Camp), and if there's a bootable CD/DVD in the drive that'll show too. Use the mouse to select the partition you want to boot (or use the arrow keys to select and press Enter/Return to activate).
If you get to the boot-selection screen and do not see the MacOSX choice, sorry, you really did destroy your MacOS partition. On the other hand, if it is listed, phew, just select it.
Once you have both MacOSX and Windows installed, switching between them is fairly easy. You can use the reboot-with-the-Alt-key method, this is a temporary choice, at the next reboot (without the Alt key) it will boot into the currently selected boot partition. The selected boot partition is managed by System Preferences : Startup Disk in MacOSX, and when in Windows (after installing the Apple driver package) you should find a boot camp control panel, there's usually a boot camp system tray icon too, you can right-click this and choose boot in MacOSX.
To re-install, make sure you have the MacOSX install media (DVD) in your drive, then reboot and either hold down the C key (this tells the firmware to boot from the CD/DVD drive), or reboot and hold down the Alt key to get to the boot selector, choose the install CD/DVD...
During install watch for any choices that say the disk will be repartitioned, you don't want to do this otherwise you will overwrite your Windows partition... (I haven't been through this particular sequence before, so I'm unsure if MacOSX will install without destroying the bootcamp partition)....
