Well, I love the command line, I use Lynx to browse the web sometimes and I try to do all with the Command Line, and searching I found an Instant Messenger for the command line named CenterIM.
You can use this very cool IM to enable your Yahoo, Msn Messenger, ICQ, Jabber, etc account into one "Old School" menssenger. CenterIM has very useful tools to configure the messenger and the accounts. If you loe the CLI just like me, download it from here. Download the latest version (the previous has a problem with the msn login) Enjoy!!
Source: Voices in my Head