Well as one small example, in this case for an iPad, not an iPhone, the Nodelet area on the right hand side. On pm this requires you to click the link Nodelet Settings (if you can find it, and I can't offhand see where it's got to) and put in a sort code like 1, 2 etc, which the application then changes to 1.9, 2.9 etc (why is this?) and then press save (well actually I think it's called submit). The whole area could be drag and drop with a small 'x' showing on hoverOver for delete.
The automatic renumbering of nodes to 1.9 and so on is so you have it easier to insert one or more nodelets between nodelets 1 and 2 - it would be pretty ugly to need to manually renumber all nodelets just to move the nodelet with (current) number 9 up in between the nodelets with (current) numbers 1 and 2.
But man, my text is prosaic and unstimulating, go into a store and play with an iPad.
Thanks - I already did that and felt uninspired.