No prob, strange. I know you won't feel the effects of 'Cube withdrawl right away, but trust me, you'll feel an odd tinge. Some things to do while you wait:
1)Read. If there's a novel, comic, manga (same thing, only different...), trashy romance book you've been holding off, now's a good time read it.
2) Play another system if you have one. Play the hell out of it. Make some up challenges (play with out dying, do large chunks, etc.)
3) Hang with friends. Self explantory.
Before you know it, you'll get new 'Cube, and you'll be rearing to go.