We know this because back in college and in the year or so following, Mark Zuckerberg held lots of instant message conversations with friends and confidants about his plans for life and work. Due to a lawsuit or two, these instant messages were preserved. We have viewed some of them.

Raptr is a social utility that makes it easier to play games with friends. With Raptr you can track your gaming activity and chat in-game across all major IM networks in one buddy list, including AIM, Yahoo, MSN, GTalk, Xfire, ICQ, Facebook Chat and Xbox Live.

For the last few weeks, I’ve been playing with a fabulous new toy called Tropo. Tropo pretends to be a cloudy voicy serious businessy thing, but really it’s just a big fun toy written for me and all my fellow geeks who have always wanted to hack a phone system but never got around to it.

Yuuguu is a screen sharing and instant messaging service built to make working together simpler. Improve your online meetings, presentations, remote support and remote team working with Yuuguu.