My NPRbackstory experiment got some press this week when Josh Benton from Harvard's Neiman Journalism Lab published an in-depth piece on the utility. Josh and I had discussed the project last fall, right before I started working for NPR (the utility was cooked up as a homegrown effort to play with the API and is not officially endorsed by NPR). More recently, he saw an interesting backstory piece pop up on the Kentucky Derby and plumbed his own archives. I'm particularly excited by his focus on how the tool extracts value from existing news archives.
And of course I'm grateful for all the positive mentions on twitter... and for my employer not pulling my API key when they found out what I had done ;-)