LeadingList.com - list of fastest growing websites, update daily
leadinglist.comThis is cool.
Are you caching the data? It would be cool to see a graphical interface of this over time. The guys at insidefacebook have done a nice iteration of this idea on the analytics of facebook apps and pages (http://pagedata.appdata.com)
It would also be cool if you could somehow integrate Compete and Quantcast into here too (not that any of those three are terribly accurate - but would be fun to look at).
Yes I am caching the data starting from today :) Thanks for your comment. I will improve the interface and add more statistics about the sites later, possible the two sites you just mentioned.
This list won't show the big old sites because we know them all along. (Who doesn't know that pinterest is rising really fast?) Enjoy :)