What is Twitter ? Let's read the definition from the web site :
"A global community of friends and strangers answering one simple question: What are you doing?Answer on your phone, IM, or right here on the web!"
This service is a new type of blog called "micro-blog": every post should have a maximum dimension of 140 characters, and you should think to it as a kind of SMS message (the SMS message dimension is 160 chars in one sending).
Obviously people can read Twitter messages sent by their own network of friends and acquaintances, in a informal way, from anywhere in the world, simply using a mobile phone, even not a brand-new one (you just send an SMS message).
I thinks Twitter is something nice, not really devastating, something which is immediate and fresh.
I've decided to change my blog layout to include a space called "Twitter updates" (on the right bar -> ) where I will publish little thoughs via SMS, especially when I will be on vacation in Ireland, that is in one week ;-)
No GPRS networks, no wi-fi connections, not internet cafè, no "sexy" Blackberry: simply one SMS, some plain text , some smileys...
Twitter. (2007, August 5). In Wikipedia, The Free Encyclopedia. Retrieved 07:06, August 6, 2007, from http://en.wikipedia.org/w/index.php?title=Twitter&oldid=149407451
Twitter. (17 luglio 2007). Wikipedia, L'enciclopedia libera. Tratto il 6 agosto 2007, 07:05 da http://it.wikipedia.org/w/index.php?title=Twitter&oldid=9907732.