RIM co-CEO Jim Balsillie actually declined to show off the his company's tablet today on the Web 2.0 Summit stage, but in private he was more than kind, treating us to a nice long glimpse at the BlackBerry PlayBook in a quaint hotel hallway. We only got to heft the one-pound slate for a few seconds, but we got the basic feel of the device in the hand -- warm to the touch, solid if a little plasticky, with a responsive glass touchscreen up top and a bottom that's mildly rubberized. Balsillie didn't bother to locate the "
