Jyri Engstrom and friends have released an early version of what they are calling a “mobile social phonebook”. The application, called Jaiku, is currently designed for Symbian Series 60 devices. To quote the developers explanation:

“We invented the term ‘rich presence’ to describe the many relevant things a phone knows about you. 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.”

[via The Mobile Technology Weblog, ]