Rich presence on Jaiku includes an IM-style away line, your phone profile (ring volume, vibrate), location (country, city/region, neigborhood), Bluetooth devices around, upcoming calendar events, and the duration how long your phone has been idle.
Though it works only on Series 60 phones (though not on S60 version 3) it has some serious potential of keeping track of your friends and family. Nice app to build a micro social network. You can put your presence button on your blog, MySpace page or whatever. I still think it is best suited for on the go presence. We will follow these guys closely. Meanwhile, try it out and let us know what you think. (via)