That's an interesting post, and an equally interesting library. However, Walltime is more concerned with the displaying of dates than the detection of timezones.
The example I give from the post explains it like this "... if I’m a user in Australia, and I want to post something at 3:00 AM Chicago time, where the majority of my followers are, how do I calculate that accurately with JavaScript and send it up to the server?". Or, if I'm a user in Australia, but I want to display all my dates on the site like I'm a user in Chicago, how would I do that?
The example I give from the post explains it like this "... if I’m a user in Australia, and I want to post something at 3:00 AM Chicago time, where the majority of my followers are, how do I calculate that accurately with JavaScript and send it up to the server?". Or, if I'm a user in Australia, but I want to display all my dates on the site like I'm a user in Chicago, how would I do that?
Take a look at the github page description for more info about the type of problems it can help with: http://sproutsocial.github.com/walltime-js/