Okay, if you want to SPEAK to Hal, you will need a voice recognition software, and the
Freeware version for Hal does not come with voice chating, only keyboard chatting, but Hal
used synthesized voice to reply to your comment.
I am sure there are some good voice recognition software around, but I haven't got
around to test any of it at the moment, but I will. For now, just use keyboard like you
doing on MSN or Yahoo Messenger.