In-page realtime filtering of the transmissions table, allowing you to quickly filter the results for a specific frequency, station name or language. For example: to display only shortwave broadcasts in english, just type "english" in the text field located under "Language". The filter also works for frequency and station name. As a bonus, the filters are kept when you navigate the site (so don't forget to clear the filters if you don't see any results).
That is on the main page, under the 27 Jan 2011 entry. I see there is a problem with Chrome for Mac, I am using Windows, so must be a problem there too!
Scott