We already knew to expect a 7-incher today, and that's exactly what we got in the Kindle Fire. We just asked Amazon Kindle vice president (and thinking man) Russ Grandinetti when we might expect a larger successor. With a smile, Russ said "Stay tuned," and left it at that. If you'll recall, RIM's Ryan Biden told us at a past Engadget Show that there was "no reason" the 7-inch BlackBerry PlayBook couldn't be shipped in a different size, and given recent
