Leapfrog posted an interesting article on the topic.
"Imitating adults is one of the primary ways children learn. In a world increasingly saturated with information and communication technologies (ICT), it is natural for children to want access to these tools too," writes author Jim Gray.
So as long as babies aren't spending too much time on the old iPhone or Blackberry, (like their parents often do), maybe it's actually useful? These tools, the post suggests are going to be a part of their everyday life and in a few years won't really be considered "technology" just as we don't consider a radio technology now.
What do you think?