That's a good one... lol
The only way currently to let two bots chat, is via AOL's AIM... just go sign up for two logon names, then use the Ultra Hal AIM Bot on each one... they'll talk forever... the thing about it is, they might start talking gibberish... when one can't reply intelligently, it will of course try... the other will learn that reply as if it were the correct reply - even if it has nothing to do with previous statement/ topic ... so that's something to consider...
Sometimes a few of us let our 'bots' chat to see what happens. Usually we're testing the brains after we've made some changes...
In any event - good luck...