Here you can use the embedded Quakenet IRC WebChat client to talk to us through IRC.
You will need JavaScript enabled to use this client.

Simply enter a name into the "Nickname" field, and click "connect" to automatically connect to the #assaultcube channel.

Please read this wiki article if you would like a more permanent solution or need some tips on how things work on IRC. If you require a response to something, please be patient (at least 30 min), as people "idle" in IRC, and may take time to respond.