Sentiment analysis is performed by extracting words of positive or negative meanings from Twitter status, and animated smiley then is drawn accordingly
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YES for eBay
Building a sentiment analyser for your Twitter feed
Scripting Twitter with Perl
Text Your Customers Now
Update Twitter and FriendFeed from the Linux Command Line
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.