Building my first iPad app - beyond the initial idea

One on the thing that Steve Jobs helped us to understand is to try to build products that we would like to use ourselves. So, what could be part of my own Tumblr client?

In my quest to create a very simple Tumblr client, the next step is to define what this simple client should do on the 1.0 release. We cannot start the next design steps without a very descriptive application description. So, what this 1.0 release should be able to do? What goals should I try to achieve?

• Put the content (the pictures) at the centre of the user experience (pretty much like QuickTumblr or Dribbblr);
• Browse only pictures (skip blog posts with media type other than pictures because I want to create a Tumblr image browser);
• Browse Tumblr without user authentication (without authenticating the user, the application could still allow browsing of Tumblr blogs in general something the API seems to allow);
• Authenticate the user to the his Tumblr Dashboard;
• Logoff the currently logged in user;
• Think that at some point the application could support to show one picture in full screen mode;
• Design the application in a way to allow more interaction features with other Tumblr functionality eventually in a future release (liking blog posts, rebloging to followers, saving pictures the the camera roll, seeing blog post comments, etc.)
• Support all iPad orientations;

As you can see, this will be a very basic Tumblr client. By making it this simple, I'm aiming to be honest with how much work I can put into this as I'm not a full time iOS developer. My resources are also very limited.