Chat & browse are both a hit & miss affair. When you use the Browse, it will do a search of their comp. if it can, & it will show their ip in the search label. That's where you get the ip. As for chat, well if you set it up so you can view who has chat enabled then you should be able to send a chat. But remember, lots of people leave their LW running overnight, or away during the day whilst they're at work or school or hidden in the background whilst they work on other things on the comp.