[optimus]

How are you determining if a tweet is positive, negative, or neutral?

[illdave]

It assigns a sentiment score based on a large bag of words. I'm making improvements to it each day, and it's slowly getting better. Terrible at picking up sarcasm though, but I think most sentiment analysis tools are.

[eli]

The Twitter API lets you search by mood, I would assume it's just passing those along.

[abhaga]

AFAIK that is an emoticon based thing, not real sentiment analysis.

[instakill]

It does? Never heard of that before.