Liking @path's new iPad app - and props to launching it even if all the edge cases for the grid-landscape layout hasn't been worked out. The math behind the grid/aspect ratios are all sorts of crazy, I can only imagine. The design details are stellar per usual.
Not sure if this will increase my activity much as the network size and pace of updates makes the experience perfect for the phone ( altho I admit that Path is my go to network for updates at the moment). Landscape view is great for consumption but the portrait view seems like a noisier version of the app on the phone -- don't really think you need the ever present navigation even if the real estate is available.