Depends of course on what you want to do. As a simple example, once could write a web page using PHP that accepts the status update (a POST or GET HTTP request), and writes out (to a file) an HTML page that contains information from that request. Players could then just visit the page that is written for an always-up-to-date status of the tournament. I'll try to put together an example for an upcoming release.
To see what the feature does, configure it to write the status to a file and then press the "Attempt Update Now" button. Then go look at the file and you'll see what kind of information is written/sent. It is basically the same variables & values you have access to for points formulas. Those variables can tell you lots of things, like the current round/level, how much time is left, how many players are left, the size of the pot, etc.
I plan to add an option to format the data in JSON notation. This should be easily consumed by most languages and tools out there.