Check out the new Twitter viz by @danielgm at your.flowingdata
There were some Twitter API changes again. Hope to get things fixed by next week. Sorry for the inconvenience...
You should be able to log in to YFD again. Twitter changed their API, which caused a blip. Your data was still logged during this time.
Sorry for the lack of updates folks. Getting the Twitter logging back up is still on my list but it might be a while.