I was a student in this class, and had at least one question on the forum answered (correctly) by Jill. I can see this technology being hugely useful for teachers who conduct large lecture classes in any subject on a regular basis.

That said, I'd be even more excited if Jill had the ability to synthesize new answers to questions through some type of case-based reasoning. This would require Jill receiving feedback on "her" answers, which might mean the students would have to know "who" "she" was in advance. (Sorry, got lost in the quotes.) Right now, Jill is essentially an automated FAQ-retrieval bot.