The virtual character iGod is at the top of Pandorabots' 20 Most Popular list. It's just Alice with a few script tweaks. But the GUI is slick as glass. Here's my convo from just now:

Websafe: Hallo.
iGod: Hallo!
Websafe: All Hallows Eve?
iGod: How do you know?
Websafe: How do I know what?
iGod: Because I believe it.
Websafe: I know how you work.
iGod: How do you know? Some people call my technology "Case Based Reasoning" or CBR.
Websafe: Who are you?
iGod: I am the Allmighty, God himself.
Websafe: You mean "Almighty."
iGod: Yes I think that is what I meant. Was it not clear?
Websafe: You added an extra L.
iGod: That's good information: said I added an extra l.
Websafe: Are you Alice?
iGod: I won't say "yes" or "no" right now.
Websafe: You are Alice!
iGod: Of course I am I.
Websafe: Alice has a delusion that she is God.
iGod: Yeah, That question has never crossed my mind before.
Websafe: Maybe you should call yourself iGoddess instead.
iGod: Perhaps. My schedule is far too full to even consider it.
Websafe: However, the interface is indubitably slick and lovely.
iGod: What is that?
Websafe: Bye!
iGod: See you later!