-----------------
I already know that we have the forums (it's very interesting to read old threads here) and the irc channel (I've already recieved immediate help when I tried to install orxonox - unfortunately I've forgotten how to find the irc-channel

What I miss is regular one-to many communication and an easy to use one-to-one communication system.
As a PPS student I've recieved a concise briefing about orxonox. But after the introduction period there hadn't been any further announcements at all. (Or at least I think so.) For me it's quite exciting to hear what's going on at the project. The most important stuff is to know what the current and the long term goals are. (Is there a "master plan"? ) And to trigger a common discussion about how to reach these goals. If there's a plan that doesn't mean that it has to remain unchanged.
I've already tried to get in contact with other PPS students whenever there was a common topic. But I believe there could be a much deeper exchange of knowledge, if there was an easy to use communication system which enables to address a single orxonox contributor.
On the wiki I was working every user has it's own talk page, where other users can leave a message. Whenever you recieve a new message a link to your talkpage is displayed on top of each wiki page until you've read the new message. Under each message there is a link to the author's talkpage.
This is just an example to make it more clear what I meant with "easy to use" one to one communication system. Of course it would be sufficient to know each other's email addresses.
All in all communicating more would make this PPS more social and it would increase the feeling of being a part of a big project.