In a chat with Om Malik, David Karp, CEO of Tumblr, had this to say about the iPad mini:

I am over laptops and the posture that comes with them. I am coding a lot less, so I use my computers a lot less. I still want to simplify even further and carry just one device. So, I want to try the iPad Mini with cellular antenna as my only device and as a phone replacement, and use Skype and/or Google Voice instead.

It’s cool how simplifying can actually be liberating. I’d be interested to check back in 6 to 12 months and see if David is still rocking this setup, and if not, why.

David Karp on the iPad mini