PingMe Messenger is a new group messaging app that enables friends and family to message each other in real-time, no matter what device they use. Ones installed you can find friends from within your contacts or via Facebook or Twitter. It has a sleek design and works fast, and if you use PingMe, you are on map and your friends can always trace you out easily with geo-location enabled messages. » PingMe Messenger From RadiumOne Labs

Translation Fire developer, TNT Creations, announced this week that its first version of Transfire has passed 200,000 downloads. This comes just weeks after securing $170,000 in its first-round of equity funding. Transfire is a chat application that instantly translates chat messages into over 50 languages. » Translation Fire Translates Chat Messages Into Over 50 Languages

Microsoft just launched their 4th iPhone application. After Microsoft Tag, Seadragon Mobile and Bing  they released the official Windows Live Messenger application for the iPhone. You can chat, share photos, checking updates and emails on your Windows Live Homepage and it makes use of push notification to inform you about new chat messages. At this point its only available in the US and French App Store but other countries can download it soon.

Nimbuzz released a new version of their application to bridge the 3G VoIP gap, and also turn the iPod touch into an iPhone, with free Wifi calls to instant messaging buddies already available, a full dial-pad, and the ability to make VoIP calls.
» App Store – Nimbuzz

iBamb offers a service that gives its users the opportunity to stream live video from your iPhone or web-cam using 3G or WiFi network. The simplicity of the application and the unlimited mobility gives you the opportunity to instantly share your experience with your viewers and interact and communicate through the web- to-mobile chat
» Cydia – iBamb (live video streaming and chat)

Nimbuzz lets you call, chat, message, and send photos, music and video on the go, for free. From one contact list, use your favorite features to connect with all your buddies from Skype, Windows Live Messenger, Yahoo! Messenger, ICQ, GoogleTalk, AIM, GaduGadu, Jabber and Twitter, plus 23 social networks including Facebook and MySpace.
» App Store – Nimbuzz

Beejive is a well known name in instant meassaging and they have now released an iPhone version. It is a very reliable, it logs on every time I have connection no errors, unlike mobilechat witch relies on a seperate server that always seems to be down. The new app supports landscape mode and portrait mode. It has an all new chat bubble witch is pretty neat. The $16 price tag does seem to be a little much but once you try it you’ll regret ever hesitating to click “Buy”. All around five stars easy to use and reliable a must have.
» App Store – Beejive