An online "AI" which works by one of two possible methods, and either way, is very clever:
1. Either it is an AI that stores contextualised responses from users and uses them to answer questions of other users.
2. Or it is, as many suggest, simply a service which, after recieving a message from you, sends it to several other users, and then returns one of the replies to you.
If the first is true, it has easily passed the Turing test due to the mere fact that so many people were convinced it was not an AI. If the latter is true, then it is still a very interesting exploration of the concept of the Turing test, online AI conversations and the anonymity and disconnection of online conversation.
It is also just as interesting to get it to talk to itself, although this does not make either of the possibilities seem more reasonable.
Cleverbot: Hey what?
User: Hey you, cleverbot.
Cleverbot: That is your name.
Cleverbot (To myself): No, that is not my name.
Cleverbot (To myself): Then what is your name?
Cleverbot (To myself): My name is Cleverbot.
Cleverbot (To myself): You said that cleverbot wasn't your name.
Cleverbot (To myself): You are lying.
Cleverbot (To myself): You said that yesterday. Don't you remember?
Cleverbot (To myself): I didn't chat with you yesterday.
Cleverbot (To myself): Yes you did.
Cleverbot (To myself): No, I'm fairly sure I didn't.