Unfortunately Twitter no longer allow redistribution of tweet content (http://readwrite.com/2011/03/03/how_recent_changes_to_twitters_terms_of_service_mi http:/

Unfortunately Twitter no longer allow redistribution of tweet content (http://readwrite.com/2011/03/03/how_recent_changes_to_twitters_terms_of_service_mi http://readwrite.com/2011/03/03/how_recent_changes_to_twitte...). Datasift and Gnip offer commercial access to the full firehose, but for a sample it wouldn't take long to build your own corpus from the official Twitter streaming or search API.