There is so much of talk happening on Twitter everywhere, both in favour and against. One of the best things about Twitter is it's API and there are lots of mashups coming up using it. This guy David Troy has made Twitter Map , Twitter Search and Twitter Vision.
Google Maps and Twitter mashed up. Search for a Twitter user and it shows the location of the user on the map or search for a location and it shows all the twitters from that location. Good to find random friends from your locality.
Simple search for twitters from a specific user.
The coolest of the lot. This one randomly broadcasts the twitters that are coming in on Google map. Its like watching tv. Its basically the Twitter public time line refurbished. A real time killer.