Nokia Conversations ran a post recently about mobile IM clients.
I posted with this list of things I'd like improved in Nokia Chat:
* Less space between chat messages
* Replace the non-standard menus with more familiar S^3 ones
* Add a screen that includes all protocols' contacts
* Option to hide the process from the task manager
* Need a battery-friendly theme for AMOLED screens
* Add facebook protocol
* File/Image transfers
* Chat history saved after app in closed
Would anybody like to contribute?
I've posted this message on Nokia Support Discussions, Ovi Store, AllAboutSymbian and betalabs.