Facebook is working on a system of "paying" for WiFi with a simple check-in, and it has been experimenting with this for a while.
In certain places, mostly in cafes around its headquarters, customers can get free WiFi just by checking into Facebook at that location.
It started at one of the company's hackathons a year ago, where a couple of engineers came up with the idea and put together a prototype.
Facebook liked it so much it decided to give it a shot. Soon after, the company started testing the idea with some local businesses.
Last month, Cisco began supporting the free WiFi with Facebook system in some of its routers, simplifying the process greatly.
The fact that a hardware manufacturer is supporting the system is an obvious sign that Facebook has big plans for the technology.
It makes sense for users and Facebook alike, as paying for the Internet with a check-in means people get free Internet, and Facebook gets more info on their whereabouts, the places they like to visit, and so on.
Interestingly enough, as Wired noticed, Facebook's invitation to the unveiling tomorrow had a coffee mug stain on it. The invitation read, "A small team has been working on a big idea. Join us for coffee and learn about a new product."
So far, there have been rumors of the event having to do with a Google Reader replacement of some sort, or video in Instagram.