I have never used Nimbuzz myself but many people I know swear by it. Nimbuzz is a free IM client that aggregates your IM conversations into one application. The problem was that Nimbuzz did not keep up with the times and is only now supporting OS 5.0. There is one caveat that your device must be running OS 18.104.22.168XX and higher for it to work but most recent releases are higher than that.
As a reminder Nimbuzz lets you chat on Skype, Facebook & MySpace or IM your friends across other major social networks including MSN, Yahoo!, Google Talk, Gadu-Gadu, Hyves, StudiVZ and more.
Other features include:
- Never miss a thing with home screen notifications of new chats.
- Auto-reconnect for switching between 3G, 2G and Wi-Fi.
- Integrate Nimbuzz ringtones, blinking LED and vibration with your BlackBerry profile.
- Enjoy a multimedia experience with clickable URLs.
- Display pictures, avatars, emoticons & personal messaging.