Whenever I stumbleupon I new tool I like to give it a shot and the first thing that comes to mind is my 'learning environment' or some such. All I initially wanted was a simple Venn Diagram creating tool (I tested several of those). This, iDesk, does some much, exploits the multi-touch surface of an iPad and is great fun and versatile.
'Subjects' and 'Art History' have vanished under 'writing'.
A shifting thing where clients call the shots when freelance work takes precedence.