Use both Delete and Backspace in Macbook
Solution 1:
You can use KeyRemap4MacBook to remap the eject key to forward delete.
Partway down this List of Prepared Settings are details under "Change Eject Key."
Solution 2:
KeyRemap4Macbook is great, but it has way too much configurability and not very much documentation. I found this other tutorial that lets me play around with the default keymapping in ~/Library/KeyBindings/DefaultKeyBinding.dict. This is both fast, and keyboard specific; which works very well for me