"Previously, building SMS apps was hard... it could take months of negotiations, approvals, and hundreds or thousands of dollars up-front and every month to get started.  With Twilio SMS, it's as easy as buying a Twilio phone number from the Twilio account portal or Phone Numbers REST API for $1 / month, and immediately start receiving and sending text messages using Twilio's SMS REST API for just 3 cents per message."

"twttr is a text messaging service based on the idea that everyone and everything has a status. twttr keeps you connected to your friends by subscribing to their status." - mobile mutual glancing.