Killer apps

Killer Applications for the next Nokia internet tablet (and for the current one too)
Following on from Quim's calling out for ideas abot applications which should be pushed by Nokia as part of the release of the next tablet and Fremantle software release, we should have a think about what would make a killer app. Please be fairly realistic.

To those submitting ideas - please give your name & time/date and as full an explanation of the idea as you can. To everyone else, please comment if something similar already exists, any problems or added features you think might be cool, etc.