Back in 2008 when we launched collabedit, we weren't exactly sure what people would use it for. When we surveyed our users a few months later, we found out that collabedit was really good for technical phone interviews.
We spoke with several different companies who were using it in this way. We were happy to hear about how much time and effort it was saving them. However, they told us there was still a lot that could be done to make the process even better.
We took time to listen to their suggestions and spent the next few months building out those features.