Ambiance creator Matt Coneybeare is temporarily offering a free copy of version 1.0 as a gesture of goodwill to the negative backlash to the 2.0 upgrade of the iPhone audio app.
When released last summer, Ambiance (link opens iTunes) -- along with aSleep -- introduced "environmental enhancers" to the iPhone. These apps would produce sounds ranging from rain and storms to pieces of technology to white noise. The intended effect is to drown out background noise, such as the annoying leaf blower currently being used outside my window, and let you concentrate on your work or get some sleep.
Ambiance 1.0, now renamed to Ambiance Classic, was well-received. In a review done back in August, Brett noted that some of the sounds were surprisingly good and that the application was easy to use. As with aSleep, Ambiance Classic included all of the sounds with the application. Over time, Ambiance gained features and additional sounds, swelling up to a download that was more than 50MB (Ambiance Classic clocks in at 51.1MB).