No-one knows when the MacBook will be updated. Apple's notoriously secretive, to the point they frequently announce and start selling a product the same day.
The MacBook's not great for games. Intel's integrated graphics are pretty weak when it comes to games -- quite a bit worse than even entry-level ATI/nVidia GPUs. Whether it's "good enough" is down to what you consider adequate. I've no idea how well FIFA'07 will work, I'm afraid -- but I'm fairly sure you'd be playing on pretty much lowest detail settings. If the gaming's important, the MacBook may not be for you, tho' I'll probably get lynched for saying it around here... I think you'd best see FIFA running on either a MacBook or a similar spec. PC first, if possible...
RAM, as always, as much as is affordable. 1GB should be decent.
I personally don't consider the 7200RPM drive worth it unless you think your work will be hitting VM frequently -- and even then, the money might be better spent on RAM first if you feel you don't need the extra storage.
However, one nice feature of the MacBook is the HD is very easy for a user to upgrade. Take a look at
this video in you're interested in that.
The MacBooks are nice little machines, but I'm not sure it'll hold up to your gaming requirements in its current form. I don't see a problem with it for the rest of your uses.