Slick is messenger application for mobile devices.
It allows you to chat with your friends connected though various online messaging applications.

Currently it is still in development, and alpha version is available for free for public testing.

Version history

0.24 (Oct 6 2007) MSN protocol
0.25 (Oct 10 2007) Saving message history
0.26 (Oct 14 2007) Online/total buddy count near group name, protocol-specific emoticons
0.27 (Oct 17 2007) Fixed vibration crash (S60 3rd ed), fixed crash with emoticon selection, protocol logging

Features:
Supported protocols:
ICQ, Yahoo, AIM, MSN
Text messaging
Emoticons
Alerts - sound, backlight, vibration, notify window displaying number of new messages
Group and buddy management (add, delete, rename)
Message history

Supported devices:

Nokia 3230, 3620, 3650, 3660, 6260, 6290, 6600, 6620, 6630, 6670, 6680, 6681, 6682, 7610, N-gage, N70, N90
Siemens SX1, Panasonic X700, X800, Samsung D720, D730, Sendo X