Slac is a project mainly written in JAVASCRIPT and PHP, it's free.
Smart Location Aware Chat Application.
This hack demonstrates the use of Yahoo! APIs to build a chat client which shows latest happenings around buddies and gives you the topics with which you can break the ice ;).
Yes, you can start a conversation with that out-of-touch-for-long girl, with something like, "Hey girl! Seems like its heavy rain near your place, you enjoying it ;)". Or may be, console your boss when the stock market has fallen down drastically, say, " Boss, you know what so-and-so stocks are gonna fall soon, better safegaurd your investment".
The final hack will be available on http://slac.in/ [Yay! we haz domain too :D ]. Anyone can signin with yahoo ids and become a chatty-chatter :).
Team: Praveen vaka Jay Mahadeokar Adarsh J