Both of you have asked two great questions. I'll answer the fastest one first.
kread: The new ebook added the fractions, and then also fixed some minor mistakes that were there from the first version.
tallerteacher: You're correct about the matches for SuperSpeed 1000. You want the kids to stay with the same partner because they are working on a mutual/team goal. There is only really one way to mix it up because we want kids setting and breaking their records. The way that we switch it up is to have each student do it on their own. The game is played exactly the same, they just do it out loud, by themselves. I only do this about every 5-6 times we play. This is great because you're always going to have those kids who want to impress you with their ability, but feel bogged down because their partner is slowing them down.
Power to the Teacher!