Added in 1.5
/hop [-cn] [#channel] [message]
Parts the current channel and joins a new one. If no new channel is specified, it parts and rejoins the current channel without closing the window.
-c - cycles the specified channel by parting and rejoining it.
-n - minimizes the channel window.
[#channel] - #channel to (re)join.
[message] - Part message to send to the #channel.
;Part/Join #channel. /hop #channel BrB