I'm sure anyone who is a fan of Team Fortress 2 has seen the video with the leaked announcer voice talking about friendship but just in case you haven't
Well the Team Fortress 2 Blog has been updated with a comic all about this rumored mode.
This comic seems to detail a friendship between a soldier and a demoman, the link from the actual blog states Attention Employees... Friendship ends in one day.
I assume there will be an update to the comic or something tomorrow. This might be old but I haven't seen it yet so I decided to post.