For the workshop we used a download.py script written by Stephen to get all of the data, which was tarred up and put into subdirectories. John ZuHone and I have been trying to add more sample data, so that people can (if they like) get started right away with using yt. All of the cookbook recipes have been or are being rewritten to use larger datasets than the old RD0005 item, and many are being switched to use FLASH data instead of Enzo data. All in all, we're trying to push pretty hard to make the cookbook more useful.
One question that's come up is: do we want to continue using download.py? The burden on uploaders is moderately higher, in that the files all have to be tarred up in a particular way, and they have to be added to download.py, but it does provide a measure of robustness. If we do this, can we move download.py into the main distribution, under scripts/ ? Stephen, John, others who have used the script, what do you think about this?