Because I don't really know what the technical background is, I have no idea how easy or hard (suspecting the latter) it would be to make an offline version.
The reason I am specifically interested in that is that I (when I finally have a job....graduating in the middle of an economic crisis wasn't a great idea:) will be spending at least half an hour on the train on my way to work. Obviously I don't have an internet connection but apart from that it would be the perfect oportunity for me to practice. I was thinking along the lines of being able to press a button saying that it should prepare all the characters in the review bar plus an additional few new characters. I then download the relevant information and can practice it on the train. In the evening I can then again connect the laptop to the internet where skritter can update my practice stats.
The more I write about the more difficult it seems, but for me it would definitely be an awesome feature...don't know how many other people in the skritter community commute to work by train.
David