http://gear.ea.com/titles/dead-space.html
that's EA Gear, this is where all 5000 were sold originally, if there are any further cancelations, this is where they'll go. Treehouse_Ryan is the awesome dude who's been looking after us thus far, I'm sure he'll update us again with any further developments.
By all means check the store as often as you like, but from my experience it'll be tough to be on at just the right 15 minute window if more become available. Last time Ryan let us know well ahead of time so we were prepared.
If anyone else has some helpful advice I'm sure Pixolator would appreciate it