Chat with Bob!
Guardsman Bob has switched to Twitch.TV, so there is also the possibility of joining that chat, either by their online client with the stream, or with some client like mIRC.
If you use mIRC and like to be on both networks, make an alias like this.
Tools -> Scripts Editor -> Aliases tab
/server -m 220.127.116.11 -w <twitch.tv password>
Change the password and remove the <>, password should be your Twitch user account.
Note that your IRC nick needs to be the same as on Twitch.TV website login.
Chat with GuardsmanBob and the viewers by joining the #guardsmanbob Quakenet IRC channel.