You want to know where in the world people tweet about a certain topic? Realize it using a Stream-Service which you can create with the ArcGIS GeoEvent Extension for Server!
Need more informations about the GeoEvent Extension?
Twitter for GeoEvent (Connector)
Please be aware that when using the Twitter for GeoEvent connector you are registering with Twitter as a developer and are using their public API and are subject to Twitter's terms and conditions. For example, the twitter input for GeoEvent is only going to receive a sample of the tweets being sent by Twitter's users since that is what their public API provides to developers.
The GeoEvent team conducted an extended proof-of-concept to demonstrate that, if the twitter connector is configured to follow a specific list of registered users, you *will* receive all of the tweets from those users. The "sampling" is enforced as a threshold, so following a dozen specific people you are unlikely to find that group tweeting above the threshold established by the public API. If you were to filter all tweets for a currently trending (popular) hashtag, on the other hand, you would likely receive only a sample of the tweets being sent.
Additional information is in the following FAQ.