Over the past two weeks, I've praised ifreebusy.com on several occasions, but I haven't mentioned another free calendar synchronization service, AirSet. I know I've criticized AirSet in the past, so why didn't I level the same criticism at ifreebusy.com?
The simple answer is, ifreebusy.com only stores free/busy information. AirSet stores all of my calendar information. If I have to use a Web service to synchronize calendars, I'd like to store as little personal information as possible. Ideally, I wouldn't have to use a service at all. (I call this "peer to peer" calendar synchronization.)
And yes, I do use other free Web services such as Gmail, despite my privacy concerns. No other email user has to use the same email provider as I do. and if enough people objected, I might move off Gmail as well. By keeping my calendar off the Web, I'm reducing the "attack surface" for bad things to happen to my family's personal data.
Also, check out Neil Jensen's next set of plans for ifreebusy.com, triggered in part by our conversation.