Worried that your IM addiction is gobbling up precious data usage? The latest beta of JiveTalk is now supporting Wi-Fi for its BlackBerry client. AIM, Windows Live Messenger, MySpace Messenger, Yahoo!, they’re all there for your chatting pleasure. It also looks like they’re working on a Windows Mobile client, if that’s your bag. Check out the 1.0.4 beta and help these guys iron out all the kinks!