Hi,
this was a great post to see the range of scope with the iPad. I have similar usage and for my particular interests I also read comics (Comic Zeal being preferred App). I also commute to London every day and have a bout a good 25 mins by train and around 20 mins by underground. So I also use this time either to read (from current list of around 165+ books) - read comics or re-watch a series of great TV shows. In addition after the iOS update I updated my home calendar and this syncs to my iTouch and work laptop via iCloud.
Like a lot of people in the forum the iPad becomes very much a DO NOT LEAVE HOME WITHOUT IT kind of device ...
SquiderDragon