YaBB developer and member of the BoardMod Mod Squad, JetLi... has released a new IRC chat mod for YaBB 2.2.2 called ChatIRC V1.0!  Here is an excerpt from JetLi's announcement on BoardMod:

Inspired by the "IRC Mod" from Shoeb Omar ... i have generate a completely new ChatIRC Mod
For this Mod i use a modified PJIRC Java-based Webchat Client Software (Free and open source).
 
Download? Take a look at end of this thread ...      

Feature-list:

• Chat
  
  • Smilies
    
  • Private chatrooms
    
  • Simply external control via javascript (dropdown-menue)
    
  • Auto-login
    
  • Multilingual support
    
  • Away/Back message field
    
  • Chat-User-Online in Info Center (BoardIndex)
    
  • Chat-User-Online on external Homepage (Javascript, IFrame or SSI)
    
• Profile
  
  • Alternative nickname field  
    
  • Nick password field (auto-identify)
    
• Chat Administration
  
  • The name of the chatroom (Channel)
    
  • Brief description/channelinfo of the chatroom
    
  • IRC-Host setting (your own or form included IRC Net server list)
    
  • IRC-Port setting
    
  • Language support
    
  • Chat opens in a new window (popup or yymain)
    
  • Enable guests in IRC Chat
    
  • Use standard applet style (blue) or your own applet style-setting
    
  • Info-Code for 'Chat-User-Online' on external Homepage (Javascript, IFrame or SSI)
    
  • and more ...