I'm about halfway through an excellent Coursera MOOC called Getting and Cleaning Data, part of my plan to learn R. We were just shown a slide listing a bunch of collections where we could find data sets to play with, and the first one on the list had disappeared. Turns out it was originally created by Hilary Mason, who apparently is someone I should know about in the data world! Hilary used to be the chief scientist at bitly.com, and the disappearance of this excellent list makes me wonder if they had a falling out. Regardless, and even though it's available on Archive.org, I thought I'd recreate it myself as a Delicious Tag Bundle, so I did. I added annotations to many of them, weeded out one or two that were really dead and gone, and added a couple as well, so it's not quite canonical ;-) Of course Delicious has been pretty flaky of late, so fingers crossed IT doesn't disappear!