You never know what trade-offs are involved -- with the Leonardo, which is almost identical to the Uno, they basically added 2 extra pins -- in the case of the Mega and Due, then had a lot of difital pins ~50 and fewer analog pins ~16 -- so them moved the I2C from the analog pins across the board to some of the new digital pins.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.