Do you want to back up all your gmail chat conversation history for future reference ? Well there is no software that does it in a straight forward manner. However, there is a laborious way to get this task done.
I’ve already written how you can back up Gmail history in Google groups.
Follow the same procedure mentioned in the above post, this can be really painful if you have loads of chat logs to take a back up of. In case you have lots to back up, you can do it at regular intervals or you can choose to take back up of only a few selected ones which actually mean to you !