me and my colleagues launched global chat for bioinformatics community - BioBit. It is very useful for discussions due to the "knowledge flowing" - today I ask a question about something, get an answer, tomorrow someone else asks the exact same question, and I will be able to help her / him. Or you can just discuss interesting news and papers.
Such format, in contrast to forums, allows providing the most relevant information in the very quick way and facilitates interesting discussions around the topic. It’s a new iteration of ICQ, Jabber, etc. with many chatrooms per team, in the very comfortable way.
In order to be invited there, you just need to go to the website http://bit.bioinf.me and write your e-mail there. You will get an invitation link in a couple of minutes (there are no direct registration, sadly). In the chat you can create public or private channels, send direct messages and files, etc.
Few cool examples from our experience:
channel for Russian machine learning community has almost 900 members in less than a year.
channel for Russian bioinformatics researchers has almost 200 members in less than 2 months.
If you have any questions or suggestions, please feel free to leave them here. My chat account is @vadimnazarov