Id imagine most people who have an inclination to do so would already have a Sam. Not sure that the announcement of x1000 will change much, especially in the world of amiga. People mostly know not to rely on announcements of upcoming products and will usually dive in if interested when any options are available. Obviously I have no way of knowing this for sure, but Id be surprised if there's much more of a market for new Sam boards than what is filled already.
