Mac only: The new MacBook Pro models released Tuesday brought new processor power, more hard drive space, and a little-heralded but kinda nifty feature: The addition of a right Alt key (and dropping of the mini Enter key), giving keyboard enthusiasts access to "third-level" characters and a wider array of shortcuts. For those with MacBook models older than 48 hours, free remapping utility KeyRemap4MacBook can help you reassign that tiny Enter or other under-utilized keys for similar shortcut happiness. Definitely worth the effort for programmers and coders, but potentially helpful for anyone who wants to assign Mac environment shortcuts (like Spaces, for example) to non-default keys. KeyRema ...