QuickIM Express Edition is a free software for Nokia S60 1st, 2nd and 3rd Ed, Windows Mobile Pocket PC, Palm OS, Blackberry and any other mobile which supports J2ME MIDP 2.0 that allows you to chat on the MSN Messenger/ Windows Live Messenger network.
On compatible phones, from the chat window, QuickIM Multimedia edition allows you to take pictures and record audio messages and send them to remote users.

It has the following features:

-Use pre-recorded “quick text” or emoticons or record pictures or audio messages to communicate fast and in innovative ways
-Add / delete contacts from your contact list
-Block a contact from seeing you in his/her buddy list for more privacy
-Navigate easily between open chat rooms and invite users to create multiple users chat sessions

To get your free version, please visit this link- http://www.quickim.com/support/quickim-instant-messenger-faq.html